Alton Historic Weather Records
Analyse hottest, coldest, windiest & wettest days

Alton Weather Trend Graph

Temperature (°C)

Months

Months	Historic Min Temp.	Min Temp.	Forecasted Min Temp.	Historic Max Temp.	Max Temp.	Forecasted Max Temp.
	-4.36875	-3.1		3.2437500000000004	0
	-4.424999999999998	-0.8		1.725	2.1
	-5.0062500000000005	-1.2		2.8187499999999996	5.2
	-5.0375	-1.8		1.5000000000000002	3.7
	-5.700000000000001	-0.9		2.03125	7.8
	-6.074999999999999	2.8		0.38750000000000023	9.4
	-6.4624999999999995	2.9		1.7562500000000005	8.5
	-5.21875	4.4		1.3937499999999998	15.1
	-5.756249999999999	5.3		2.7249999999999996	16.4
	-3.225	2		4.4937499999999995	8.4
	-2.8812499999999996	-2.5		6.10625	5.2
	-5.29375	-1.3		3.6937500000000005	10.2
	-6.843750000000001	2.2		0.6937500000000001	13.7
	-5.4937499999999995	-1.7		1.3750000000000002	7.1
Jan.	-5.6187499999999995	-6		1.4437500000000003	1.2
	-4.3625	-0.8		2.6499999999999995	4.4
	-4.38125	-8.6		3.4062500000000004	-0.7
	-4.481250000000001	-11.4		4.1375	-1.3
	-5.7125	-12		2.625	-5
	-6.1	-12.2		0.6562499999999999	4.2
	-6.00625	-2.8		1.25625	5.1
	-4.89375	-4.3		2.93125	-1.1
	-4.425000000000001	-13.7		2.3125000000000004	-0.3
	-4.21875	-13.8		3.7625	-11.7
	-3.4124999999999996	-12.3		3.7625	-7.8
	-3.6375	-20.6		3.025	-7.9
	-4.1625	-12.7		3.4499999999999993	-0.7
	-3.2687499999999994	-19.7		4.1625	-1.1
	-3.5124999999999997	-7.7		4.1875	-4.6
	-3.5375	-15.2		3.71875	-6.8
	-2.7375000000000003	-15		5.55	-4.9
	-2.4875000000000003	-15.6		5.106249999999999	-2.2
	-3.4625	-5.1		5.16875	1.3
	-3.6187499999999995	-3.1		5.26875	-0.3
	-4.325	-8		4.824999999999999	-1.7
	-4.55625	-9.6		2.76875	1.7
	-3.9812499999999997	-0.2		4.31875	2.4
	-4.1375	-5.1		4.575	1.1
	-4.218749999999999	-2.7		3.0562500000000004	1.4
	-4.749999999999999	-1.5		2.4625	2.9
	-5.7562500000000005	1.7		1.9999999999999998	6.2
	-5.187499999999999	-1.7		2.5249999999999995	8.6
	-5.806250000000001	1.3		2.0749999999999997	5.1
	-5.787500000000001	1.8		3.44375	12.3
	-4.475	2.2		4.487500000000001	6.9
Feb.	-3.500000000000001	6.5		4.4624999999999995	8.8
	-3.48125	4.9		4.1812499999999995	11.4
	-3.925	3.9		4.981249999999999	10.9
	-3.725	10.7		5.456249999999999	20.5
	-3.03125	10		5.499999999999999	19.3
	-2.025	1.7		9.46875	10.9
	-0.4625	-1.6		8.10625	6.8
	-0.7624999999999998	-5.5		9.043750000000001	1.6
	-1.1250000000000002	-7.8		7.9625	1.4
	-2.5125	-4		6.393750000000001	5.6
	-2.5749999999999993	-1.3		5.61875	7.1
	-2.5312499999999996	1.3		7.68125	9.6
	-0.9062500000000001	3		9.6	17.8
	-0.45000000000000007	3.2		10.274999999999999	14
	-0.25	-1.3		9.35	9
	-1.775	0.6		8.149999999999999	3
	-1.7875000000000003	2.3		7.925	9.1
	-0.33125000000000016	5.9		9.81875	16.3
	0.5874999999999999	8		8.90625	13.6
	-0.21250000000000005	12.6		10.225000000000001	23.8
	1.0625	9.1		11.399999999999999	19.3
	2.5124999999999997	1.6		11.549999999999999	18
	3.774999999999999	5.6		13.725	18.8
	4.48125	16.2		12.224999999999996	24.8
	1.9	4.9		11.993750000000002	19.8
	1.6062499999999997	-0.8		11.575	11.9
	3.53125	4.7		12.3875	13.8
	4.8375	1		13.2875	15.3
Mar.	4.7625	5.5		15.11875	14.1
	4.199999999999999	-6.2		14.062500000000002	0.1
	4.1875	-7.9		13.631250000000001	2.6
	3.5625000000000004	0.7		12.456249999999999	16.4
	2.94375	5.2		12.099999999999998	24.3
	3.3250000000000006	10.9		14.35625	26.3
	4.71875	8.3		14.287500000000001	22.9
	4.60625	8.5		13.475	25.2
	4.593749999999999	1.8		14.237500000000004	10.7
	4.7749999999999995	2.2		12.068750000000001	16.1
	3.718749999999999	7.6		12.33125	21.5
	3.0875	15.5		11.950000000000001	30.7
	3.8187500000000005	6.5		12.875	15.1
	4.51875	-1.1		13.606249999999998	13.5
	6.043750000000001	3.9		15.4375	16.6
	5.80625	11.1		16.8375	25.4
	6.58125	15.1		15.1625	25.9
	4.20625	9.5		14.50625	12.2
	6.0062500000000005	12.1		16.3875	25.2
	6.925000000000001	15.4		18.1125	28.2
	6.8875	5.5		17.275	17.3
	6.13125	3.6		15.756250000000001	17.9
	6.2875000000000005	5.3		15.675	20
	6.493750000000001	3.9		16.562499999999996	15.3
	7.512499999999999	5.7		17.1	27.1
	7.925	14		19.406250000000004	29.7
	8.36875	11.4		18.662499999999998	20.4
	7.3	8.4		17.98125	25.5
	7.743749999999999	15.3		18.20625	30.1
	8.39375	19.6		19.51875	30.2
	7.8375	19.7		17.84375	32.6
Apr.	7.656250000000001	16.4		17.893749999999997	28.3
	7.6875	14.7		16.8125	27.7
	8.331249999999999	16.3		18.79375	32.1
	8.58125	6.5		19.018749999999997	15.1
	7.53125	4.2		18.625	19.3
	7.5	5.2		17.612499999999997	22.2
	7.506249999999999	10.3		17.58125	28.6
	8.1	14.8		17.81875	27.1
	8.518749999999999	13.1		18.36875	30.1
	9.331249999999999	15.6		18.05625	22.2
	9.175	10.9		19.24375	27.2
	9.19375	11		19.05	28.9
	9.325000000000001	16.2		19.099999999999998	23.5
	9.981250000000001	12		19.362499999999997	16.2
	10.968750000000002	9.5		21.275	18.1
	11.79375	5.1		20.20625	20.4
	11.156250000000002	6.7		20.35625	16.3
	10.943750000000001	6.7		20.331249999999997	15.6
	11.768749999999997	5.2		19.96875	26.2
	10.65	15		19.50625	29.4
	11.224999999999998	9		21.287499999999998	13.9
	11.575	7.6		21.55	17.3
	12.6	5.3		23.99375	20.8
	13.418750000000003	9.2		23.20625	25.7
	12.918750000000001	11.1		22.531250000000004	27.8
	12.76875	11.4		22.518749999999997	24.1
	13.231249999999998	7.5		21.893749999999997	26.7
	13.212500000000004	10.5		22.131249999999998	30.3
	12.656250000000002	14.3		22.656250000000004	25.7
	12.85625	8		22.331250000000004	26.2
May	13.125	14		21.918750000000003	30.9
	13.18125	18.8		22.768749999999997	32.5
	14.018749999999999	17.7		22.26875	32.2
	14.075	18.6		22.849999999999998	31.2
	13.406250000000002	16.1		23.53125	26
	14.593749999999998	12.2		23.65	17
	14.818750000000001	10.6		23.81875	21.7
	13.9125	15		24.025000000000002	21.5
	14.750000000000002	16.7		24.61875	23.3
	15.606249999999998	17.3		25.81875	27.8
	16.956250000000004	13.5		25.943749999999994	30.2
	16.293750000000003	16		25.3125	30.4
	17.375	17.6		26.437500000000004	32
	17.306250000000002	17.9		26.15	33.4
	17.8	18		26.631249999999994	31.9
	16.793750000000003	19.3		26.343749999999993	30.9
	17	17.9		26.3375	31.5
	16.23125	19		25.406250000000004	28.7
	16.762500000000003	16.5		25.606250000000003	29
	16.6125	13.1		27.2	29.2
	17.75625	14.7		27.7125	31.4
	18.55	20.1		28.225	31.8
	17.818749999999998	22.6		27.09375	33.1
	17.887500000000003	22.9		26.987499999999997	32.9
	17.093750000000004	20.5		26.75	28
	17.599999999999998	23.8		27.893749999999997	33.5
	17.93125	24.6		28.356249999999996	35.8
	18.3625	21.6		27.99375	36
	18.6375	18.5		28.218750000000004	31.5
	18.51875	18.6		27.98125	27.4
	18.550000000000004	17.5		29.081250000000004	25.3
Jun.	19.337499999999995	13.4		29.61875	27.9
	19.818749999999998	14.7		29.4875	29
	20.4125	15.6		29.937500000000004	35.5
	20.662499999999998	19.7		29.4125	28.4
	20.087500000000002	15.9		29.768750000000004	31.6
	20.281249999999996	19		30.712500000000002	31.4
	20.81875	19.7		30.650000000000006	29.7
	20.768750000000004	16		29.562500000000004	22.5
	20.45625	14.4		29.374999999999993	29.8
	19.96875	15.9		28.862500000000004	29.8
	19.981250000000003	20.7		30.275000000000006	31.7
	20.76875	19.9		29.787500000000005	26.1
	20.1625	21.8		29.518750000000004	30.5
	20.1	22.5		29.543750000000003	35.4
	20.375000000000004	23.7		30.0375	36.1
	20.800000000000004	24.1		30.175000000000004	37.6
	20.237500000000004	23.5		29.0875	36.7
	19.193749999999998	23.3		27.731249999999996	37.2
	18.956250000000004	24.6		29.34375	38.1
	20.25625	24.2		30.075000000000003	35.7
	20.950000000000003	20.6		30.649999999999995	32.8
	21.3375	20.5		30.518750000000004	31.4
	21.25625	21		29.912499999999994	33.2
	20.693749999999998	21.2		29.943750000000005	33.6
	20.843750000000004	22.5		29.5	34.4
	20.393750000000004	21.7		29.862499999999997	34.7
	20.63125	21.1		30.83125	28.3
	21.293750000000003	20		31.012500000000003	33.1
	21.331250000000004	20		30.593749999999996	33.6
	21.0625	19.9		30.95625	35.8
Jul.	21.1375	20.5		29.89375	36.5
	21.143749999999997	22.2		30.825000000000006	32.7
	21.268749999999997	22.7		30.1125	35.2
	21.325	23.4		30.59375	36.3
	21.837500000000002	23.5		31.687499999999996	33.5
	22.5	21.4		32.137499999999996	36.6
	21.599999999999994	24.3		30.474999999999998	36.7
	21.206249999999997	18		30.90625	29.9
	21.88125	17		31.675000000000004	29.1
	21.331250000000004	16.1		31.349999999999998	29.7
	21.312500000000004	19.9		30.812500000000004	33
	22.037499999999998	23.3		31.10625	39
	21.643749999999997	25.5		30.675	39.1
	21.262500000000003	25.4		30.575	36.7
	20.575	19.9		29.5875	33.3
	19.76875	18.6		28.80625	33.5
	19.65	20.8		28.1375	27.1
	19.731249999999996	19.4		29.99375	24.1
	19.7875	19		29.487499999999997	29.7
	20.4875	17.7		30.375	31.6
	19.96875	18.8		29.29375	32.4
	20.3	19.8		29.475	34.3
	20.4625	20.6		29.7	27.7
	19.931250000000002	19.6		29.28125	33.8
	20.2625	21.5		29.481250000000003	34.8
	20.41875	21.9		29.618750000000002	36.7
	20.24375	24.7		29.512499999999996	37.7
	20.049999999999994	24.9		29.987499999999997	38.1
	20.11875	25.1		29.749999999999996	37.1
	19.66875	23.1		28.843749999999996	38.4
	19.2875	25.3		27.96875	36
Aug.	18.475		25.7	27.574999999999996		37.4
	19.3125		24.1	28.16875		30.7
	19.712500000000002		22	28.8875		30.1
	19.312500000000004		20.8	29.324999999999992		34.5
	19.43125		21.5	29.1125		32.6
	19.924999999999997		21	29.25		28.4
	19.325		17.8	28.69375		22.1
	18.962500000000002		15.4	28.124999999999996		26.4
	18.3625		18.6	29.012500000000003		29.2
	18.68125		19.4	29.53125		30
	19.7375		19.6	30.356250000000006		29.9
	19.662500000000005		19.4	29.90000000000001		30
	19.69375		19.8	29.95		30.2
	19.74375		19.7	29.999999999999996		29.7
	20.225		19.8	30.356249999999996		29.9
	19.693749999999998		19.1	29.112499999999997		28.6
	19.381249999999998		19.2	29.843750000000004		28.6
	19.737500000000004		18.9	28.5375		28.1
	18.799999999999997		17.9	28.406249999999996		28.1
	18.568750000000005		18.3	28.212500000000006		28.5
	18.837500000000002		18.3	27.887500000000003		28.1
	17.5125		18	27.2125		27.2
	17.55625		17.7	27.637499999999996		27.7
	17.050000000000004		16.7	27.624999999999996		27.2
	16.331250000000004		15.8	26.950000000000003		26.2
	16.237500000000004		16.3	26.112500000000004		26.5
	16.575		16.2	27.049999999999997		26.9
	16.306250000000002		16.5	26.506249999999994		27.1
	15.912500000000001		16.3	26.5125		26.5
	15.79375		15.6	26.818749999999998		26.7
	15.60625		15.5	27.056249999999995		26.8
Sep.	15.825			27.09375
	16.568749999999998			26.574999999999996
	16.968750000000004			26.58125
	17.45			27.781250000000004
	17.262500000000003			27.418750000000003
	16.91875			27.8375
	16.9375			26.39375
	15.606250000000003			25.11875
	14.84375			24.743750000000002
	14.799999999999999			25.137499999999996
	14.96875			25.21875
	14.562500000000002			25.056250000000002
	14.906249999999998			24.94375
	14.624999999999998			25.174999999999997
	14.35			24.474999999999998
	14.18125			24.08125
	13.987500000000002			24.581250000000004
	14.593749999999996			23.83125
	13.099999999999996			22.73125
	12.7875			22.0875
	12.43125			23.7375
	12.981250000000001			22.631249999999998
	12.556250000000002			22
	11.06875			22.70625
	11.35			22.7125
	11.793750000000001			23.125
	11.799999999999997			21.831249999999997
	11.5625			21.4
	11.625000000000002			20.8625
	10.881250000000001			20.4875
Oct.	9.774999999999999			19.256250000000005
	8.34375			18.812499999999996
	8.09375			18.356249999999996
	8.29375			18.90625
	7.93125			17.549999999999997
	8.19375			18.931250000000002
	8.687499999999998			18.65
	8.08125			19.45625
	10.14375			20.51875
	10.531250000000002			18.84375
	9.4375			17.89375
	8.71875			17.51875
	7.64375			16.224999999999998
	6.350000000000001			12.993749999999999
	5.3125			14.0125
	7.318749999999999			15.125000000000002
	5.831250000000001			13.21875
	4.475			14.081249999999999
	5.45625			15.593749999999996
	5.718749999999999			15.91875
	8.068750000000001			15.85
	6.8125			15.762499999999996
	6.900000000000001			15.162500000000001
	5.46875			14.343750000000002
	5.40625			14.231250000000001
	4.843749999999999			14.531250000000002
	5.4125			14.14375
	3.36875			14.900000000000002
	1.875			10.03125
	0.91875			9.89375
	1.5437500000000002			10.893749999999999
Nov.	2.85			11.418750000000001
	2.61875			10.74375
	3.1499999999999995			12.3125
	2.34375			10.33125
	2.0375			10.681249999999999
	2.85625			10.681249999999999
	3.1687499999999997			11.4875
	1.5499999999999998			9.8125
	2.0687499999999996			9.375
	2.25625			11.45
	1.5374999999999999			10.599999999999998
	0.9375000000000002			9.39375
	-0.5437500000000001			7.34375
	-0.21874999999999992			6.60625
	0.9375			8.66875
	1.0625			9.187499999999998
	0.4624999999999999			7.631250000000001
	0.5687500000000001			7.893750000000002
	0.8749999999999999			8.775
	1.1			8.60625
	6.938893903907228e-17			7.231249999999999
	-1.6062500000000002			5.2124999999999995
	-2.46875			4.1187499999999995
	-0.3937500000000001			6.625
	-0.8999999999999999			6.525
	-0.8749999999999998			6.593750000000001
	-1.8375			6.8500000000000005
	-1.2125			6.36875
	-0.49999999999999994			7.01875
	-0.7437499999999999			6.95
Dec.	-0.10624999999999996			6.4437500000000005
	-0.44375000000000003			5.8374999999999995
	-1.1062499999999997			4.8875
	-2.96875			4.63125
	-1.8312500000000003			5.6
	-0.8562500000000002			6.75
	-0.78125			7.068749999999999
	-1.6375			6.09375
	-1.44375			6.1499999999999995
	-0.42500000000000004			6.3187500000000005
	-0.5125000000000001			6.4
	-0.5812499999999999			6.54375
	-0.5687500000000001			6.65625
	-1.38125			6.0062500000000005
	-1.2937500000000002			5.46875
	-1.9000000000000006			4.1000000000000005
	-2.0333333333333328			5.226666666666666

Max Temp.

Historic Max Temp.

Min Temp.

Historic Min Temp.

Yearly Summary 2026

39°C

Highest Temp

27 Jul. 26

-21°C

Lowest Temp

26 Jan. 26

Seasonal Breakdown

Hottest MonthJuly34.08°C

Coldest MonthJanuary-5.89°C

Wettest MonthApril6.05mm

Windiest MonthMarch25.94km/h

Alton Climate Change InsightsSee how climate patterns are evolving over time. Temperature shifts, rainfall trends, and extreme events—all in one place.

Weather City Ranking GloballyExplore Real time of the world’s hottest & Coldest Cities based on current temperature data.

Frequently Asked Questions

1. What is the hottest month in Alton historically?

July is historically Alton's hottest month, with average maximum temperatures around 31°C. During peak heatwave events, the highest recorded temperatures have reached 39°C on 2012-06-28.

2. What is the coldest month in Alton historically?

January is Alton's coldest month, with average minimum temperatures around -5°C. The all-time record low of -23°C was recorded on 2014-01-06.

3. What is the average annual rainfall in Alton over the past 17 years?

Alton's average annual rainfall is approximately 1293.1mm, based on records spanning 17 years.

4. How many rainy days does Alton experience on average per year?

Alton historically records approximately 166.8 rainy days per year. April has the highest number of rain days at an average of 15.7 days.

5. What is the all-time highest temperature ever recorded in Alton?

The all-time highest temperature recorded in Alton is 39°C on 2012-06-28.

6. What is the all-time lowest temperature ever recorded in Alton?

The all-time lowest temperature recorded in Alton is -23°C on 2014-01-06.

7. What is the windiest time of year in Alton historically?

Alton experiences its strongest winds during March. The historic gust record of 47.9 kph was recorded on 2012-12-20.

8. What is the highest and lowest humidity in Alton during a year?

Usually, Alton's humidity peaks in July at around 77.5% and drops to its lowest in October at approximately 66.6%.

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Alton Historic Weather RecordsAnalyse hottest, coldest, windiest & wettest days

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Yearly Summary 2026

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Alton Historic Weather Records
Analyse hottest, coldest, windiest & wettest days