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

Fullerton Weather Trend Graph

Temperature (°C)

Months

Months	Historic Min Temp.	Min Temp.	Forecasted Min Temp.	Historic Max Temp.	Max Temp.	Forecasted Max Temp.
	7.043749999999999	14.5		18.5125	17.6
	7.268750000000001	13.4		19.03125	16.4
	8.200000000000001	12.6		18.400000000000002	14.9
	8.175	14.6		19.231250000000003	15.3
	8.49375	12.1		19.556249999999995	14.9
	9.125	9.2		19.874999999999996	16.8
	9.15	10.8		19.168750000000003	14.1
	9.106249999999998	8.9		19.39375	15.1
	8.98125	5.1		18.531249999999996	14.7
	8.881250000000001	6.1		18.05625	17.7
	8.818750000000001	7.5		18.9875	21.4
	8.549999999999999	8		19.2875	22.4
	8.456249999999999	9.3		19.625	24.7
	9.0125	10.2		20.424999999999997	26.3
Jan.	9.243749999999999	11.9		20.362500000000004	26.4
	9.668750000000001	9		19.956249999999997	23.5
	9.95625	7.1		20.012499999999996	23.3
	9.787500000000001	11.5		20.181250000000002	28.4
	9.762500000000001	9.9		18.987499999999997	27.7
	9.91875	9.1		19.28125	22.9
	9.106250000000001	9.1		19.05	16.8
	8.8125	12.3		19.10625	14.6
	9.100000000000001	13.1		19.381249999999998	14.3
	8.649999999999999	11.9		19.75625	16.6
	8.80625	5.2		19.799999999999997	17.8
	9.068750000000001	7.7		19.99375	20.5
	8.80625	6.5		20.14375	23.1
	8.73125	9.3		20.775000000000002	21.3
	9.70625	9.8		20.424999999999997	27
	9.7125	11		19.112499999999997	28.3
	9.0625	12		19.55625	29.3
	9.00625	11.5		19.112500000000004	21
	8.8	11.3		19.443749999999998	19.6
	8.875	10.1		18.756249999999998	26.2
	8.8875	13		19.150000000000002	28.4
	8.975	14.3		18.818749999999998	23.4
	8.956249999999997	14		19.3625	19.5
	9.849999999999998	11.6		19.79375	19
	9.73125	9.5		20.50625	25.5
	9.562500000000002	13.2		20.575	23.6
	9.65	12.9		20.26875	18
	8.987499999999999	14.1		20.581249999999997	15.3
	9.075	7		20.662499999999998	19.9
	9.6	11.6		20.843750000000004	22.5
	9.856250000000001	10.6		20.812499999999996	17.1
Feb.	9.356250000000001	11.8		20.83125	15.6
	9.51875	11.3		21.237500000000004	12.6
	9.20625	11.1		19.574999999999996	13.4
	9.35625	9.9		19.23125	12.4
	9.28125	5.7		17.493749999999995	11.8
	8.525	4		18.875	13
	9.231250000000001	3.7		19.018749999999997	20.1
	8.8375	9.1		19.00625	24.3
	8.681250000000002	9.4		19.475	26.8
	8.675	13.7		19.8375	22.9
	8.86875	13.2		20.14375	22.5
	9.14375	12.9		19.66875	25.3
	9.5375	14.2		18.85625	30.2
	9.45625	16.7		19.6125	27.4
	9.725	14.4		19.962500000000002	26.4
	10.10625	12.6		18.868750000000002	15.6
	9.8375	11.5		18.793750000000003	22.6
	9.60625	12.5		19.375	17.7
	9.212499999999999	10.5		19.775	20.9
	9.85	10.1		18.875	23.6
	9.64375	10.5		18.818749999999998	26.3
	9.312500000000002	13.4		18.98125	30.2
	9.100000000000001	12.5		20.743749999999995	21.2
	10.04375	13.3		20.568750000000005	18.4
	10.575000000000001	11.9		20.20625	24
	10.793750000000003	14		20.668749999999996	34.7
	10.706249999999997	16.2		20.143750000000004	31.5
	10.6	15.7		20.424999999999997	23.7
Mar.	10.887499999999998	13.3		21.45625	32.2
	10.71875	15.1		21.737499999999997	35.2
	10.9375	17.3		21.775000000000006	35.4
	10.53125	19.3		20.46875	32.9
	10.6875	18		20.425	32.9
	11	17.7		19.712500000000002	32.1
	10.643749999999999	17.2		19.974999999999998	29.1
	11.268749999999999	15.6		20.15	28.2
	10.956249999999999	15.4		20.56875	28.2
	10.899999999999999	16.2		21.06875	28
	10.818750000000001	15		20.356250000000003	26.4
	10.306249999999999	15.5		20.0625	28.5
	10.78125	15		21.568749999999998	26.9
	10.987499999999997	16.2		21.525000000000002	32.1
	11.256250000000001	17.6		21.381250000000005	30.5
	11.375	15.1		20.5125	23.4
	11.325000000000001	15.5		20.806249999999995	19.9
	11.681249999999999	16.4		20.9875	22.3
	11.1	15		20.056249999999995	22
	11.225	12.6		20.931250000000002	33.5
	11.100000000000001	15.2		21.7375	35.6
	11.04375	12.5		21.3875	31.4
	11.4625	16.2		22.25	30.8
	11.562500000000002	14.7		23.174999999999997	28.6
	12.20625	14.5		22.9625	28.4
	11.575	14.9		23.375	25.5
	11.924999999999999	16.8		23.368750000000002	23.7
	12.062500000000002	15.3		21.981250000000003	23.2
	12.018749999999999	13.7		20.83125	19.7
	11.7	11.5		20.081250000000004	20.5
	11.112499999999999	11.3		20.431250000000002	25.2
Apr.	11.01875	11.5		21.1625	26.5
	11.493749999999999	13.4		21.575	24.7
	11.84375	12.9		22.731249999999996	29.2
	12.462500000000002	13.5		23.231250000000003	29.8
	12.643749999999999	15		22.725000000000005	28.3
	12.368750000000002	13.4		22.78125	24.2
	12.89375	13.2		23.1125	22.7
	13.09375	12		22.318749999999998	24.9
	12.799999999999999	12.1		22.20625	25.7
	13.1375	13.2		21.937499999999996	23.7
	13.11875	13.9		22.693749999999998	20.1
	13.268749999999999	12.8		22.368749999999995	20.5
	13.125	11.7		22.718749999999996	22.9
	13.068749999999998	10.7		23.450000000000003	24.7
	13.568750000000001	11.2		24.418749999999996	24.9
	13.7625	12.9		24.187500000000004	23.9
	13.60625	15.2		23.88125	25.1
	13.55625	14.8		23.825	28.4
	13.774999999999999	14.7		24.725	21.6
	13.80625	14.5		24.181250000000006	21.9
	14.025	12.2		22.95	20.2
	13.412500000000001	11.5		21.687499999999996	24.3
	12.9375	12.9		21.868750000000002	28.5
	12.975000000000001	15.3		22.093750000000004	25.4
	13.231250000000001	15.5		22.450000000000003	28.4
	13.700000000000001	15.3		23.28125	28.3
	13.49375	15.2		23.825	28.3
	13.424999999999999	15.2		24.456249999999997	21.9
	14.499999999999998	15.7		24.474999999999998	23.4
	14.137500000000003	14		23.96875	24.6
May	13.85625	15.6		22.89375	23.7
	13.749999999999998	15.8		21.918749999999996	23.7
	13.793750000000001	13.9		21.7625	21.5
	13.75	16.1		22.287500000000005	28.1
	13.9625	12.8		22.575000000000003	32
	14.250000000000002	16.9		23.5	25.5
	14.23125	14.8		22.881249999999998	30
	13.899999999999999	15.6		22.437500000000004	23.6
	13.8625	15.6		21.75	24
	13.950000000000001	15.7		22.45	23.8
	14.15	13.3		22.268749999999997	23.3
	14.03125	14.1		21.650000000000002	20.6
	13.968750000000004	12.7		22.625	21.5
	14.0625	11.6		23.524999999999995	23.4
	14.43125	13.7		24.287499999999998	25.1
	14.787500000000001	13.1		24.250000000000004	26.2
	15.106250000000001	13.2		24.325	31.1
	14.91875	15.8		24.79375	28.8
	15.181250000000002	15.8		24.881249999999998	24.6
	15	16.5		24.993749999999995	29.9
	15.525	16.8		25.062500000000004	29.1
	15.437499999999998	17.3		24.3375	28.6
	15.58125	14.9		23.868750000000002	24.8
	15.3125	16.6		24.068749999999998	26
	15.162500000000001	16.9		25.262500000000003	28.4
	15.70625	15.6		25.89375	28.8
	15.806249999999997	16.9		25.2375	31.7
	15.90625	18.1		25.468749999999996	32.6
	15.86875	17.7		25.068750000000005	33.8
	15.7	17.7		25.106250000000003	30.7
	15.881250000000003	15.8		26.14375	32.9
Jun.	15.85	17.1		26.531250000000004	32.3
	16.049999999999997	17		25.624999999999996	31.5
	15.956249999999997	16.9		25.325	28.3
	15.925	17.3		25.65625	24.8
	15.968750000000002	16.8		26.456249999999997	24.9
	16.54375	15.2		27.425	24.2
	16.88125	15.1		27.10625	25.1
	16.431250000000002	15.5		26.73125	29.2
	16.43125	16.4		26.66875	30.9
	16.26875	16.3		26.562499999999996	30.2
	16.593749999999996	16.7		26.793750000000006	29.5
	16.86875	16.8		27.325	28.8
	17.1125	17.3		28.06875	25.3
	17.518750000000004	17.1		28.1375	23.7
	17.56875	16.5		27.28125	24.2
	17.606250000000003	16.8		27.950000000000003	24.8
	17.531250000000004	16.1		28.437500000000004	25.1
	17.750000000000004	17.1		27.643749999999997	29.7
	17.48125	14.9		27.50625	33.3
	17.24375	15.3		27.33125	33.4
	17.243750000000002	16.9		27.925	30.4
	17.65625	17.3		28.425000000000004	32.9
	18.006249999999998	16.4		28.481250000000003	34
	18.21875	17.6		28.53125	34.1
	18.506249999999998	18		28.63125	32.1
	18.33125	17.4		28.931250000000002	31
	18.381249999999998	18		28.862499999999994	30.4
	18.349999999999998	17.7		28.96875	29.7
	18.2375	19.2		28.7625	34.5
	18.54375	18.5		28.806250000000006	36.1
Jul.	18.65	19.8		28.318750000000005	37.5
	18.3875	20		28.56875	35.4
	18.018749999999997	20		28.50625	34.4
	18.45625	20.7		28.325	32.3
	18.3375	20.6		28.95	33.7
	18.643750000000004	20.3		28.793750000000003	35.8
	18.418750000000003	19.9		28.48125	33.2
	18.49375	21.9		28.762500000000003	32.8
	18.79375	19.9		29.2375	37
	19.481250000000003	20.8		29.393749999999997	35.5
	19.000000000000004	20		28.58125	35
	18.9	20		28.681250000000002	38.4
	18.656249999999996	19.6		28.812499999999996	35.9
	18.1875	20		28.3	33.5
	18.21875	19.8		28.96875	33.6
	18.525000000000002	19.8		28.706249999999997	35.2
	18.818749999999998	19.9		29.218750000000004	36.4
	19.056250000000002	19.6		29.90625	36.7
	19.118750000000002	20.2		30.193749999999994	34.8
	19.193749999999998	20		30.0625	33.6
	19.05	20.1		29.525000000000006	33.1
	18.99375	18.7		29.537499999999994	32.5
	18.631249999999998	19.1		29.60000000000001	34.7
	18.525	19.7		29.381249999999998	35
	18.537499999999998	19.7		28.549999999999997	38.6
	18.7	20.6		28.88125	39.2
	18.64375	20.9		28.674999999999997	34
	18.7125	20.4		29.225	35.2
	18.6875	20		29.106250000000006	33.1
	19.087500000000002	20.8		29.681250000000002	31.8
	19.075	20.7		30.5125	32.1
Aug.	19.45625	17.6		30.724999999999998	27.6
	19.9375		21.2	30.74375		30.2
	19.66875		22.4	30.400000000000002		31.5
	19.7125		23.5	29.8375		32.9
	19.2875		23.9	29.0875		32.8
	19.375		23.5	29.218749999999996		32.3
	19.568749999999998		23.4	29.31875		31.6
	19.256249999999998		23.9	29.475		32.3
	19.40625		24.5	29.2875		33.8
	19.21875		19.3	29.54375		30
	19.599999999999998		19.1	30.106250000000003		29
	19.756249999999998		19.7	30.35625		29.8
	19.562499999999996		19.6	30.66875		30.1
	19.581250000000004		19.8	30.525		29.6
	19.943749999999998		19.8	31.087500000000006		30.1
	19.56875		19.8	30.8		29.8
	19.50625		20	30.293749999999996		29.4
	19.90625		19.9	29.975		29.1
	20.268749999999997		20.2	29.868749999999995		29.2
	20.049999999999997		20.2	30.637499999999996		29.8
	20.09375		20.2	30.606250000000003		31.1
	20.118750000000002		20.5	30.95625		30.7
	20.46875		20.4	31.718750000000004		30.6
	20.937500000000004		20.4	32.2875		30.3
	20.475000000000005		20.3	31.081249999999997		31
	20.4625		20.4	30.2		29.4
	20.2		19.9	29.450000000000003		28.2
	19.78125		19.6	29.5375		28
	19.249999999999996		19.1	29.118750000000002		28
	18.924999999999997		18.7	28.974999999999998		27.5
	18.88125		18.9	28.749999999999996		28.2
Sep.	18.85625		18.7	29.1		28.1
	18.90625			28.893750000000004
	18.318749999999998			27.375000000000004
	18.2			27.46875
	17.95625			27.74375
	18.28125			28.025000000000002
	18.08125			27.212500000000002
	17.900000000000002			27.68125
	18.006249999999998			28.743750000000006
	18.2			29.487499999999997
	18.26875			28.74374999999999
	18.175			28.356249999999996
	18.00625			29.224999999999998
	18.056250000000002			27.950000000000006
	18.04375			27.887500000000003
	17.750000000000004			28.562499999999996
	18.125000000000004			28.68125
	17.7125			28.962500000000002
	17.6625			28.175
	17.324999999999996			27.568750000000005
	16.74375			27.306250000000002
	16.53125			27.36875
	16.956249999999997			27.687500000000004
	16.868750000000002			27.26875
	16.73125			27.05625
	16.64375			27.581250000000004
	17.2			26.400000000000002
	16.14375			27.55
	16.181250000000002			25.899999999999995
	16.337500000000002			26.2125
Oct.	15.962499999999999			27.44375
	16.28125			28.1125
	16.556250000000002			26.90625
	16.45			26.743750000000002
	16.325			26.568749999999998
	16.162500000000005			26.737499999999997
	16.06875			26.731250000000003
	16.19375			25.75
	16.075			25.95625
	15.975			25.956249999999997
	16.112500000000004			24.862500000000004
	15.087500000000002			25.15625
	14.618750000000002			25.912499999999998
	14.737500000000002			26.575
	14.6375			25.749999999999996
	14.43125			25.668750000000003
	14.112500000000002			24.799999999999997
	13.831249999999999			24.706249999999997
	13.88125			24.450000000000003
	13.4			24.381249999999998
	13.062499999999998			24.225
	12.98125			25.39375
	13.262500000000001			25.23125
	13.525			23.787500000000005
	12.8125			24.24375
	12.993749999999999			24.231250000000003
	12.399999999999999			23.012500000000006
	12.081249999999999			23.781250000000004
	12.168750000000001			24.143749999999997
	12.193749999999998			24.2625
	12.512499999999998			24.68125
Nov.	12.675			22.718750000000004
	12.775			21.86875
	12.2625			22.73125
	12.149999999999999			22.375
	11.981250000000001			20.90625
	11.650000000000002			20.88125
	11.925			22.068749999999998
	12.21875			22.650000000000002
	11.993750000000002			21.66875
	11.174999999999999			21.6125
	10.78125			22.499999999999996
	10.73125			22.475
	10.799999999999999			20.674999999999997
	10.18125			20.175
	10.256250000000001			19.7125
	10.125000000000002			20.275000000000002
	10.25			20.8125
	10.443750000000001			20.624999999999996
	10.524999999999999			19.66875
	10.25			19.65
	10.056250000000002			19.79375
	9.718750000000002			19.9
	9.99375			21.0875
	9.89375			21.2875
	10.062500000000002			20.700000000000003
	10.18125			20.74375
	10.325			19.8875
	9.91875			19.437500000000004
	9.6875			19.1125
	9.53125			18.96875
Dec.	9.15			19.01875
	9.224999999999998			19.181250000000002
	9.25			19.193749999999998
	9.831249999999999			18.5625
	9.225			18.481249999999996
	9.068750000000001			18.624999999999996
	9.043749999999998			19.39375
	9.862499999999999			18.66875
	9.637500000000001			18.6375
	9.825000000000001			19.306250000000002
	9.781250000000002			17.981250000000003
	8.175			17.924999999999997
	7.737499999999999			18.262500000000003
	7.90625			18.106250000000003
	7.79375			17.737499999999997
	8.55			17.349999999999998
	8.233333333333333			17.473333333333333

Max Temp.

Historic Max Temp.

Min Temp.

Historic Min Temp.

Yearly Summary 2026

39°C

Highest Temp

9 Aug. 26

4°C

Lowest Temp

21 Feb. 26

Seasonal Breakdown

Hottest MonthAugust34.13°C

Coldest MonthJanuary9.96°C

Wettest MonthFebruary7.52mm

Windiest MonthApril19.54km/h

Fullerton 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 Fullerton historically?

August is historically Fullerton's hottest month, with average maximum temperatures around 30°C. During peak heatwave events, the highest recorded temperatures have reached 43°C on 2018-07-06.

2. What is the coldest month in Fullerton historically?

January is Fullerton's coldest month, with average minimum temperatures around 9°C. The all-time record low of 1°C was recorded on 2013-01-15.

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

Fullerton's average annual rainfall is approximately 376.5mm, based on records spanning 17 years.

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

Fullerton historically records approximately 64.9 rainy days per year. December has the highest number of rain days at an average of 8.1 days.

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

The all-time highest temperature recorded in Fullerton is 43°C on 2018-07-06.

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

The all-time lowest temperature recorded in Fullerton is 1°C on 2013-01-15.

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

Fullerton experiences its strongest winds during April. The historic gust record of 42.8 kph was recorded on 2016-01-31.

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

Usually, Fullerton's humidity peaks in May at around 62.6% and drops to its lowest in November at approximately 49.2%.

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

Fullerton Weather Trend Graph

Yearly Summary 2026

Seasonal Breakdown

Frequently Asked Questions

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