Fullerton Weather Conditions
Current Temperature Level
20 °C
42 AQI
Air quality index is: Good
Last Updated: 2025-09-13 23:00 (Local Time)
MapFullerton
Fullerton Weather Parameters
6 km/h
3 m/s
207° SSW
0 %
16 km
0 mm
1012 mb
UV Index0
Suggestions for
SundayFullerton14 Sep.
Umbrella• Optional
Clothing• Layering Must
Driving• Enjoy Driving
Sunscreen• ApplyTrending in United States
India Floods 2025: How Waterlogging Is Creating a Hidden Air Pollution Crisis?
Fullerton 10-Days Weather Forecast
Today
22°C
74 %Monday
25°C67 %Tuesday
25°C59 %Wednesday
27°C42 %Thursday
25°C61 %Friday
25°C61 %Saturday
23°C56 %Sunday
20°C63 %Monday
22°C60 %Tuesday
22°C61 %Partly Cloudy
Periodic cloud cover with temperature at 22 °C. Humidity will be at 74%, and winds will be at 15.1 km/h.30°C / 18°C
Humi.74 %
Prec.0 mm
Sunrise
06:34 AM12hrs 25min
Sunset
06:59 PMTime
Condition
Temp
Humidity
UV
Wind Speed & Dir.
12 AM
Clear
20 °C
81 %
0
5.8 kmph / SSW
Clear 
Feels 19.9 °C
Cover 13 %
Visibility 10 km
1 AM
Clear
20 °C
83 %
0
5.8 kmph / SSW
Clear Feels 19.5 °C
Cover 24 %
Visibility 10 km
2 AM
Partly Cloudy
19 °C
86 %
0
5.8 kmph / SW
Partly Cloudy Feels 19.1 °C
Cover 40 %
Visibility 10 km
3 AM
Partly Cloudy
19 °C
88 %
0
5.8 kmph / SW
Partly Cloudy Feels 18.8 °C
Cover 55 %
Visibility 10 km
4 AM
Cloudy
18 °C
90 %
0
4.7 kmph / SW
Cloudy Feels 18.4 °C
Cover 64 %
Visibility 10 km
5 AM
Cloudy
18 °C
92 %
0
4.3 kmph / SW
Cloudy Feels 18.2 °C
Cover 79 %
Visibility 10 km
6 AM
Cloudy
18 °C
93 %
0
4.7 kmph / SW
Cloudy Feels 18.3 °C
Cover 84 %
Visibility 10 km
7 AM
Mist
18 °C
94 %
0
5 kmph / SSW
MistFeels 18.4 °C
Cover 93 %
Visibility 10 km
8 AM
Overcast
19 °C
94 %
0.6
5.4 kmph / SW
Overcast Feels 18.7 °C
Cover 90 %
Visibility 10 km
9 AM
Cloudy
19 °C
91 %
1.8
5.4 kmph / SSW
Cloudy Feels 19.4 °C
Cover 84 %
Visibility 10 km
10 AM
Cloudy
21 °C
84 %
3.8
6.5 kmph / SSW
Cloudy Feels 21.1 °C
Cover 78 %
Visibility 10 km
11 AM
Sunny
24 °C
72 %
6
8.3 kmph / SW
SunnyFeels 24.6 °C
Cover 21 %
Visibility 10 km
12 PM
Sunny
27 °C
60 %
7.8
11.2 kmph / SW
SunnyFeels 28.1 °C
Cover 5 %
Visibility 10 km
1 PM
Sunny
28 °C
54 %
8.3
13 kmph / WSW
SunnyFeels 28.8 °C
Cover 5 %
Visibility 10 km
2 PM
Sunny
28 °C
51 %
7.4
13.7 kmph / WSW
SunnyFeels 29 °C
Cover 5 %
Visibility 10 km
3 PM
Sunny
28 °C
50 %
5.4
14.8 kmph / WSW
SunnyFeels 29 °C
Cover 6 %
Visibility 10 km
4 PM
Sunny
28 °C
51 %
3.1
15.1 kmph / SW
SunnyFeels 28.6 °C
Cover 6 %
Visibility 10 km
5 PM
Sunny
27 °C
53 %
1.3
13.7 kmph / SW
SunnyFeels 28.5 °C
Cover 6 %
Visibility 10 km
6 PM
Sunny
26 °C
58 %
0.3
12.6 kmph / SW
SunnyFeels 27.2 °C
Cover 6 %
Visibility 10 km
7 PM
Clear
24 °C
65 %
0
11.5 kmph / SW
Clear Feels 25.9 °C
Cover 11 %
Visibility 10 km
8 PM
Clear
23 °C
71 %
0
10.1 kmph / SSW
Clear Feels 25.1 °C
Cover 13 %
Visibility 10 km
9 PM
Clear
22 °C
76 %
0
8.3 kmph / SSW
Clear Feels 21.6 °C
Cover 14 %
Visibility 10 km
10 PM
Clear
21 °C
79 %
0
6.5 kmph / SSW
Clear Feels 21.3 °C
Cover 19 %
Visibility 10 km
11 PM
Clear
20 °C
70 %
0
5 kmph / SSW
Clear Feels 20.3 °C
Cover 0 %
Visibility 10 km
Today
22°C74 %Monday
25°C67 %Tuesday
25°C59 %Wednesday
27°C42 %Thursday
25°C61 %Friday
25°C61 %Saturday
23°C56 %Sunday
20°C63 %Monday
22°C60 %Tuesday
22°C61 %Temp20 °C
ConditionClear
Humidity81 %
Feels19.9 °C
Cover13 %
Visibility10 km
Wind Speed & Dir.5.8 kmph / SSW
UV0
Fullerton 30-Days (September 2025) Weather Forecast
Sun.
Mon.
Tue.
Wed.
Thu.
Fri.
Sat.
1Mon.
37°23 °C
2Tue.
37°22 °C
3Wed.
36°23 °C
4Thu.
33°21 °C
5Fri.
31°20 °C
6Sat.
32°20 °C
7Sun.
33°20 °C
8Mon.
32°20 °C
9Tue.
29°19 °C
10Wed.
28°19 °C
11Thu.
28°19 °C
12Fri.
28°18 °C
13Today
26°18 °C
14Sun.
30°18 °C
15Mon.
32°18 °C
16Tue.
30°21 °C
17Wed.
30°22 °C
18Thu.
29°23 °C
19Fri.
30°23 °C
20Sat.
29°22 °C
21Sun.
28°22 °C
22Mon.
29°20 °C
23Tue.
29°19 °C
24Wed.
27°20 °C
25Thu.
27°19 °C
26Fri.
29°19 °C
27Sat.
30°19 °C
28Sun.
28°19 °C
29Mon.
28°19 °C
30Tue.
29°19 °C
SeptemberWeather Overview
No. of days:
Sunny
19
Cloudy
6
Rainy
5
Snowy
0
The monthly weather averages in Fullerton consist of 19 sunny days, 6 cloudy days, 5 rainy days, and 0 snowy days.
Fullerton's Locations Weather Conditions
United States's Hottest Cities - September 2025
1.
Tolleson, United States
Clear
19%
0
7.2 kmph / NNW
2.
Tempe, United States
Clear
19%
0
5.8 kmph / N
3.
Guadalupe, United States
Clear
19%
0
7.2 kmph / NNW
4.
Phoenix, United States
Clear
19%
0
7.2 kmph / NNW
5.
Tamuning, United States
Partly cloudy
70%
1.9
22.7 kmph / ENE
6.
Scottsdale, United States
Clear
19%
0
7.9 kmph / N
7.
Gilbert, United States
Clear
20%
0
3.6 kmph / NNE
8.
Casa Blanca, United States
Clear
20%
0
3.6 kmph / W
9.
Palm Springs, United States
Clear
40%
0
6.5 kmph / W
10.
San Tan Valley, United States
Clear
20%
0
3.6 kmph / ENE
Last Updated: 14 Sept 2025, 06:33 AM
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