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Weather Fullerton: Current forecast

Fullerton / California (CA) / United States

21.1 °C
Feels like 21.1 °C
Min 14 °C / Max 29 °C
Weather Fullerton: Sunny, 21 °C Sunny
10.1 km/h SW
Wind
11.6 km/h SW
Gusts
1013 hPa
Pressure
0 mm
Precipitation
57 %
Humidity
4.2
UV index

Pollen (today)

Hazel None
Alder None
Birch High
Oak Moderate
Grass Moderate
Mugwort None
Ragweed None
06:16 / 19:26
Sunrise / Sunset
07:31 / 22:39
Moonrise / Moonset
Waxing Crescent (3 %)
Moon phase

Updated: Apr 19, 2026, 19:26 CEST Apr 19, 2026, 10:26 PDT

Today's Summary

In Fullerton the weather today is sunny. The thermometer currently shows 21.1°C. Light clothing is enough – and remember sun protection if it's sunny. During the day temperatures will range between 14.4°C and 28.6°C.

Hourly forecast – Fullerton, today

Apr 19, 10:00
21 °C
Sunny
Fullerton Apr 19, 10:00: Sunny, 21 °C
Apr 19, 11:00
24 °C
Sunny
Fullerton Apr 19, 11:00: Sunny, 24 °C
Apr 19, 12:00
26 °C
Sunny
Fullerton Apr 19, 12:00: Sunny, 26 °C
Apr 19, 13:00
26 °C
Sunny
Fullerton Apr 19, 13:00: Sunny, 26 °C
Apr 19, 14:00
27 °C
Sunny
Fullerton Apr 19, 14:00: Sunny, 27 °C
Apr 19, 15:00
27 °C
Sunny
Fullerton Apr 19, 15:00: Sunny, 27 °C
Apr 19, 16:00
24 °C
Sunny
Fullerton Apr 19, 16:00: Sunny, 24 °C
Apr 19, 17:00
22 °C
Sunny
Fullerton Apr 19, 17:00: Sunny, 22 °C
Apr 19, 18:00
20 °C
Sunny
Fullerton Apr 19, 18:00: Sunny, 20 °C
Apr 19, 19:00
19 °C
Sunny
Fullerton Apr 19, 19:00: Sunny, 19 °C
Apr 19, 20:00
18 °C
Clear
Fullerton Apr 19, 20:00: Clear, 18 °C
Apr 19, 21:00
18 °C
Partly cloudy
Fullerton Apr 19, 21:00: Partly cloudy, 18 °C
Apr 19, 22:00
18 °C
Clear
Fullerton Apr 19, 22:00: Clear, 18 °C
Apr 19, 23:00
18 °C
Clear
Fullerton Apr 19, 23:00: Clear, 18 °C
Apr 20, 00:00
18 °C
Clear
Fullerton Apr 20, 00:00: Clear, 18 °C
Apr 20, 01:00
17 °C
Clear
Fullerton Apr 20, 01:00: Clear, 17 °C
Apr 20, 02:00
17 °C
Clear
Fullerton Apr 20, 02:00: Clear, 17 °C
Apr 20, 03:00
17 °C
Clear
Fullerton Apr 20, 03:00: Clear, 17 °C
Apr 20, 04:00
16 °C
Clear
Fullerton Apr 20, 04:00: Clear, 16 °C
Apr 20, 05:00
16 °C
Clear
Fullerton Apr 20, 05:00: Clear, 16 °C
Apr 20, 06:00
16 °C
Clear
Fullerton Apr 20, 06:00: Clear, 16 °C
Apr 20, 07:00
17 °C
Sunny
Fullerton Apr 20, 07:00: Sunny, 17 °C
Apr 20, 08:00
18 °C
Sunny
Fullerton Apr 20, 08:00: Sunny, 18 °C
Apr 20, 09:00
19 °C
Sunny
Fullerton Apr 20, 09:00: Sunny, 19 °C
Time
10
11
12
13
14
15
16
17
18
19
20
21
22
23
00
01
02
03
04
05
06
07
08
09
Fullerton Apr 19, 10:00: Sunny
Fullerton Apr 19, 11:00: Sunny
Fullerton Apr 19, 12:00: Sunny
Fullerton Apr 19, 13:00: Sunny
Fullerton Apr 19, 14:00: Sunny
Fullerton Apr 19, 15:00: Sunny
Fullerton Apr 19, 16:00: Sunny
Fullerton Apr 19, 17:00: Sunny
Fullerton Apr 19, 18:00: Sunny
Fullerton Apr 19, 19:00: Sunny
Fullerton Apr 19, 20:00: Clear
Fullerton Apr 19, 21:00: Partly cloudy
Fullerton Apr 19, 22:00: Clear
Fullerton Apr 19, 23:00: Clear
Fullerton Apr 20, 00:00: Clear
Fullerton Apr 20, 01:00: Clear
Fullerton Apr 20, 02:00: Clear
Fullerton Apr 20, 03:00: Clear
Fullerton Apr 20, 04:00: Clear
Fullerton Apr 20, 05:00: Clear
Fullerton Apr 20, 06:00: Clear
Fullerton Apr 20, 07:00: Sunny
Fullerton Apr 20, 08:00: Sunny
Fullerton Apr 20, 09:00: Sunny
Temperature (°C)
Chance of rain (%)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Precipitation
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Wind (km/h)
SW
10
SW
10
SW
13
SW
14
SW
16
SW
16
SW
18
SW
19
SW
18
SW
15
SW
13
SW
12
SW
9
SW
8
SW
7
SW
7
SW
7
WSW
7
WSW
4
SW
3
S
2
SSE
3
SSE
4
SSW
5
Pressure (hPa)
1013
1013
1013
1012
1012
1011
1011
1011
1011
1012
1013
1013
1014
1014
1014
1014
1014
1014
1014
1014
1014
1015
1015
1015
Humidity (%)
57 %
50 %
46 %
44 %
42 %
44 %
49 %
54 %
58 %
66 %
71 %
74 %
55 %
57 %
60 %
62 %
64 %
66 %
67 %
68 %
69 %
67 %
60 %
51 %
Cloud cover (%)
0 %
4 %
1 %
0 %
0 %
0 %
1 %
3 %
2 %
11 %
18 %
29 %
0 %
6 %
0 %
0 %
0 %
0 %
0 %
0 %
0 %
0 %
0 %
0 %

14-day weather forecast – Fullerton

14-day trend for Fullerton: Temperatures stay fairly stable over the period with no big swings. Lows can drop to around 13.9°C at night, with daytime highs up to 28.6°C.

Date
Apr 19
Apr 20
Apr 21
Apr 22
Apr 23
Apr 24
Apr 25
Apr 26
Apr 27
Apr 28
Apr 29
Apr 30
May 1
May 2
Fullerton April 19, 2026: Sunny
Fullerton April 20, 2026: Sunny
Fullerton April 21, 2026: Patchy rain possible
Fullerton April 22, 2026: Sunny
Fullerton April 23, 2026: Sunny
Fullerton April 24, 2026: Partly cloudy
Fullerton April 25, 2026: Partly cloudy
Fullerton April 26, 2026: Patchy rain possible
Fullerton April 27, 2026: Partly cloudy
Fullerton April 28, 2026: Partly cloudy
Fullerton April 29, 2026: Sunny
Fullerton April 30, 2026: Sunny
Fullerton May 1, 2026: Sunny
Fullerton May 2, 2026: Sunny
Temperature (°C)
Chance of rain (%)
0
0
86
0
0
0
0
87
0
0
0
0
0
0
Precipitation
—
—
1.1 mm
0 mm
—
0 mm
0 mm
0.2 mm
0 mm
0 mm
—
—
—
—
Wind max (km/h)
19
19
22
18
19
19
21
12
18
16
17
18
19
19
Date Weather Min °C Max °C Sunrise Sunset Moonrise Moonset Moon phase
April 19, 2026 Fullerton April 19, 2026: Sunny Sunny 14 °C 29 °C 06:16 19:26 07:31 22:39 Waxing Crescent (3 %)
April 20, 2026 Fullerton April 20, 2026: Sunny Sunny 16 °C 23 °C 06:14 19:27 08:25 23:50 Waxing Crescent (9 %)
April 21, 2026 Fullerton April 21, 2026: Patchy rain possible Patchy rain possible 16 °C 22 °C 06:13 19:28 09:28 — Waxing Crescent (17 %)
April 22, 2026 Fullerton April 22, 2026: Sunny Sunny 14 °C 20 °C 06:12 19:29 10:36 00:51 Waxing Crescent (27 %)
April 23, 2026 Fullerton April 23, 2026: Sunny Sunny 15 °C 22 °C 06:11 19:30 11:47 01:43 Waxing Crescent (38 %)
April 24, 2026 Fullerton April 24, 2026: Partly cloudy Partly cloudy 16 °C 20 °C 06:10 19:30 12:56 02:24 First Quarter (49 %)
April 25, 2026 Fullerton April 25, 2026: Partly cloudy Partly cloudy 16 °C 20 °C 06:09 19:31 14:02 02:58 Waxing Moon (60 %)
April 26, 2026 Fullerton April 26, 2026: Patchy rain possible Patchy rain possible 15 °C 17 °C 06:08 19:32 15:05 03:28 Waxing Moon (70 %)
April 27, 2026 Fullerton April 27, 2026: Partly cloudy Partly cloudy 15 °C 21 °C 06:07 19:33 16:05 03:55 Waxing Moon (79 %)
April 28, 2026 Fullerton April 28, 2026: Partly cloudy Partly cloudy 16 °C 22 °C 06:06 19:33 17:04 04:20 Waxing Moon (87 %)
April 29, 2026 Fullerton April 29, 2026: Sunny Sunny 16 °C 25 °C 06:05 19:34 18:03 04:45 Waxing Moon (93 %)
April 30, 2026 Fullerton April 30, 2026: Sunny Sunny 17 °C 24 °C 06:04 19:35 19:02 05:12 Waxing Moon (97 %)
May 1, 2026 Fullerton May 1, 2026: Sunny Sunny 17 °C 24 °C 06:03 19:36 20:02 05:41 Full Moon (99 %)
May 2, 2026 Fullerton May 2, 2026: Sunny Sunny 17 °C 26 °C 06:02 19:37 21:01 06:13 Waning Moon (100 %)
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