30-Day Weather Forecast

Fullerton Monthly Weather Forecast

United States Fullerton, United States

Aug 1 – Sep 4, 2026 as of 04:08

Fullerton 30 Days Forecast Calendar

27 Jul Mon

No data

28 Jul Tue

No data

29 Jul Wed

No data

30 Jul Thu

No data

31 Jul Fri

No data

1 Aug Today
+31°C+87°F
+19°C+66°F

Overcast

2 Aug Tomorrow
+29°C+84°F
+21°C+69°F

Overcast

3 Aug Mon
+29°C+85°F
+21°C+71°F

Rainy

4 Aug Tue
+30°C+85°F
+22°C+71°F

Overcast

5 Aug Wed
+31°C+88°F
+23°C+73°F

Rainy

6 Aug Thu
+31°C+88°F
+23°C+74°F

Rainy

7 Aug Fri
+34°C+93°F
+24°C+75°F

Mainly Clear

8 Aug Sat
+32°C+90°F
+23°C+73°F

Mainly Clear

9 Aug Sun
+35°C+95°F
+24°C+75°F

Mainly Clear

10 Aug Mon
+35°C+95°F
+25°C+77°F

Rainy

11 Aug Tue
+27°C+80°F
+22°C+72°F

Partly Cloudy

12 Aug Wed
+29°C+84°F
+19°C+67°F

Mainly Clear

13 Aug Thu
+22°C+71°F
+19°C+65°F

Rainy

14 Aug Fri
+28°C+83°F
+19°C+66°F

Rainy

15 Aug Sat
+27°C+81°F
+16°C+61°F

Clear

16 Aug Sun
+26°C+79°F
+19°C+66°F

Overcast

17 Aug Mon
+33°C+91°F
+21°C+69°F

Clear

18 Aug Tue
+35°C+96°F
+23°C+73°F

Clear

19 Aug Wed
+35°C+95°F
+24°C+74°F

Partly Cloudy

20 Aug Thu
+32°C+90°F
+23°C+73°F

Overcast

21 Aug Fri
+28°C+83°F
+19°C+65°F

Clear

22 Aug Sat
+29°C+84°F
+17°C+63°F

Clear

23 Aug Sun
+28°C+82°F
+17°C+63°F

Clear

24 Aug Mon
+29°C+85°F
+17°C+63°F

Clear

25 Aug Tue
+33°C+91°F
+20°C+67°F

Partly Cloudy

26 Aug Wed
+33°C+91°F
+23°C+73°F

Rainy

27 Aug Thu
+31°C+87°F
+21°C+70°F

Rainy

28 Aug Fri
+28°C+82°F
+21°C+69°F

Overcast

29 Aug Sat
+29°C+85°F
+18°C+65°F

Partly Cloudy

30 Aug Sun
+32°C+89°F
+21°C+69°F

Overcast

31 Aug Mon
+35°C+95°F
+24°C+76°F

Mainly Clear

1 Sep Tue
+37°C+98°F
+25°C+78°F

Partly Cloudy

2 Sep Wed
+29°C+85°F
+23°C+74°F

Rainy

3 Sep Thu
+30°C+86°F
+20°C+68°F

Overcast

4 Sep Fri

No data

5 Sep Sat

No data

6 Sep Sun

No data

Fullerton Weather Overview

Sunny
26
Rainy
9

In this forecast period, Fullerton has 26 sunny days, 0 cloudy days, 9 rainy days, and 0 snowy days.

Weather forecast day by day for 2 weeks in Fullerton

Saturday, 1 August

Fullerton is expected to see Overcast with temperatures around 31°C, feeling like 31°C due to expected conditions. Heavy cloud cover at 100% is blocking most sunlight today. Humidity is at 50% and atmospheric pressure stands at 1013 hPa.

Sunday, 2 August

Fullerton is expected to see Overcast with temperatures around 29°C, feeling like 29°C due to strong winds. Rain is expected today, with 0.6 mm of precipitation forecasted. Heavy cloud cover at 97% is blocking most sunlight today. Humidity is at 57% and atmospheric pressure stands at 1012 hPa.

Monday, 3 August

Fullerton is expected to see Rainy with temperatures around 29°C, feeling like 32°C due to high humidity. Rain is expected today, with 23.4 mm of precipitation forecasted. Heavy cloud cover at 100% is blocking most sunlight today. Humidity is at 81% and atmospheric pressure stands at 1011 hPa.

Tuesday, 4 August

Fullerton is expected to see Overcast with temperatures around 30°C, feeling like 33°C due to expected conditions. Rain is expected today, with 7.2 mm of precipitation forecasted. Heavy cloud cover at 99% is blocking most sunlight today. Humidity is at 72% and atmospheric pressure stands at 1016 hPa.

Wednesday, 5 August

Fullerton is expected to see Rainy with temperatures around 31°C, feeling like 34°C due to strong winds. Rain is expected today, with 5.7 mm of precipitation forecasted. Heavy cloud cover at 83% is blocking most sunlight today. Humidity is at 71% and atmospheric pressure stands at 1018 hPa.

Thursday, 6 August

Fullerton is expected to see Rainy with temperatures around 31°C, feeling like 35°C due to strong winds. Rain is expected today, with 11.1 mm of precipitation forecasted. Humidity is at 67% and atmospheric pressure stands at 1017 hPa.

Friday, 7 August

Fullerton is expected to see Mainly Clear with temperatures around 34°C, feeling like 37°C due to strong winds. Rain is expected today, with 11.1 mm of precipitation forecasted. Humidity is at 56% and atmospheric pressure stands at 1017 hPa.

Saturday, 8 August

Fullerton is expected to see Mainly Clear with temperatures around 32°C, feeling like 36°C due to expected conditions. Rain is expected today, with 8.4 mm of precipitation forecasted. Humidity is at 62% and atmospheric pressure stands at 1016 hPa.

Sunday, 9 August

Fullerton is expected to see Mainly Clear with temperatures around 35°C, feeling like 39°C due to expected conditions. Skies are mostly clear with only 15% cloud cover. Humidity is at 54% and atmospheric pressure stands at 1015 hPa.

Monday, 10 August

Fullerton is expected to see Rainy with temperatures around 35°C, feeling like 38°C due to strong winds. Rain is expected today, with 1.8 mm of precipitation forecasted. Humidity is at 49% and atmospheric pressure stands at 1011 hPa.

Tuesday, 11 August

Fullerton is expected to see Partly Cloudy with temperatures around 27°C, feeling like 30°C due to expected conditions. Rain is expected today, with 0.6 mm of precipitation forecasted. Humidity is at 53% and atmospheric pressure stands at 1015 hPa.

Wednesday, 12 August

Fullerton is expected to see Mainly Clear with temperatures around 29°C, feeling like 29°C due to expected conditions. Skies are mostly clear with only 11% cloud cover. Humidity is at 39% and atmospheric pressure stands at 1020 hPa.

Thursday, 13 August

Fullerton is expected to see Rainy with temperatures around 22°C, feeling like 22°C due to expected conditions. Rain is expected today, with 1.8 mm of precipitation forecasted. Heavy cloud cover at 100% is blocking most sunlight today. Humidity is at 71% and atmospheric pressure stands at 1021 hPa.

Friday, 14 August

Fullerton is expected to see Rainy with temperatures around 28°C, feeling like 30°C due to strong winds. Rain is expected today, with 3.6 mm of precipitation forecasted. Heavy cloud cover at 82% is blocking most sunlight today. Humidity is at 78% and atmospheric pressure stands at 1010 hPa.