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Weather Fullerton: Current forecast

Fullerton / California (CA) / United States

30 °C
Feels like 32.3 °C
Min 21 °C / Max 32 °C
Weather Fullerton: Sunny, 30 °C Sunny
16.6 km/h SW
Wind
19 km/h SW
Gusts
1014 hPa
Pressure
0 mm
Precipitation
46 %
Humidity
5.2
UV index

Pollen (today)

Hazel None
Alder None
Birch None
Oak None
Grass High
Mugwort Moderate
Ragweed None
05:53 / 20:01
Sunrise / Sunset
10:32 / 22:51
Moonrise / Moonset
Waxing Crescent (23 %)
Moon phase

Updated: Jul 19, 2026, 1:15 CEST Jul 18, 2026, 16:15 PDT

Today's Summary

If you head out in Fullerton today, you'll see a sunny sky. The thermometer currently shows 30°C. UV levels are elevated today – remember sun protection if you're outdoors. During the day temperatures will range between 20.7°C and 32.3°C.

Hourly forecast – Fullerton, today

Jul 18, 17:00
26 °C
Sunny
Fullerton Jul 18, 17:00: Sunny, 26 °C
Jul 18, 18:00
23 °C
Sunny
Fullerton Jul 18, 18:00: Sunny, 23 °C
Jul 18, 19:00
22 °C
Clear
Fullerton Jul 18, 19:00: Clear, 22 °C
Jul 18, 20:00
22 °C
Clear
Fullerton Jul 18, 20:00: Clear, 22 °C
Jul 18, 21:00
22 °C
Clear
Fullerton Jul 18, 21:00: Clear, 22 °C
Jul 18, 22:00
21 °C
Partly cloudy
Fullerton Jul 18, 22:00: Partly cloudy, 21 °C
Jul 18, 23:00
21 °C
Partly cloudy
Fullerton Jul 18, 23:00: Partly cloudy, 21 °C
Jul 19, 00:00
21 °C
Cloudy
Fullerton Jul 19, 00:00: Cloudy, 21 °C
Jul 19, 01:00
21 °C
Overcast
Fullerton Jul 19, 01:00: Overcast, 21 °C
Jul 19, 02:00
21 °C
Overcast
Fullerton Jul 19, 02:00: Overcast, 21 °C
Jul 19, 03:00
21 °C
Clear
Fullerton Jul 19, 03:00: Clear, 21 °C
Jul 19, 04:00
21 °C
Sunny
Fullerton Jul 19, 04:00: Sunny, 21 °C
Jul 19, 05:00
21 °C
Sunny
Fullerton Jul 19, 05:00: Sunny, 21 °C
Jul 19, 06:00
23 °C
Sunny
Fullerton Jul 19, 06:00: Sunny, 23 °C
Jul 19, 07:00
25 °C
Sunny
Fullerton Jul 19, 07:00: Sunny, 25 °C
Jul 19, 08:00
26 °C
Sunny
Fullerton Jul 19, 08:00: Sunny, 26 °C
Jul 19, 09:00
27 °C
Sunny
Fullerton Jul 19, 09:00: Sunny, 27 °C
Jul 19, 10:00
28 °C
Sunny
Fullerton Jul 19, 10:00: Sunny, 28 °C
Jul 19, 11:00
28 °C
Sunny
Fullerton Jul 19, 11:00: Sunny, 28 °C
Jul 19, 12:00
28 °C
Sunny
Fullerton Jul 19, 12:00: Sunny, 28 °C
Jul 19, 13:00
29 °C
Sunny
Fullerton Jul 19, 13:00: Sunny, 29 °C
Jul 19, 14:00
29 °C
Sunny
Fullerton Jul 19, 14:00: Sunny, 29 °C
Jul 19, 15:00
28 °C
Sunny
Fullerton Jul 19, 15:00: Sunny, 28 °C
Jul 19, 16:00
27 °C
Sunny
Fullerton Jul 19, 16:00: Sunny, 27 °C
Time
17
18
19
20
21
22
23
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
Fullerton Jul 18, 17:00: Sunny
Fullerton Jul 18, 18:00: Sunny
Fullerton Jul 18, 19:00: Clear
Fullerton Jul 18, 20:00: Clear
Fullerton Jul 18, 21:00: Clear
Fullerton Jul 18, 22:00: Partly cloudy
Fullerton Jul 18, 23:00: Partly cloudy
Fullerton Jul 19, 00:00: Cloudy
Fullerton Jul 19, 01:00: Overcast
Fullerton Jul 19, 02:00: Overcast
Fullerton Jul 19, 03:00: Clear
Fullerton Jul 19, 04:00: Sunny
Fullerton Jul 19, 05:00: Sunny
Fullerton Jul 19, 06:00: Sunny
Fullerton Jul 19, 07:00: Sunny
Fullerton Jul 19, 08:00: Sunny
Fullerton Jul 19, 09:00: Sunny
Fullerton Jul 19, 10:00: Sunny
Fullerton Jul 19, 11:00: Sunny
Fullerton Jul 19, 12:00: Sunny
Fullerton Jul 19, 13:00: Sunny
Fullerton Jul 19, 14:00: Sunny
Fullerton Jul 19, 15:00: Sunny
Fullerton Jul 19, 16:00: Sunny
Temperature (°C)
Chance of rain (%)
6
9
11
13
13
15
18
25
30
30
11
11
9
6
4
3
2
2
2
1
1
1
1
1
Precipitation
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Wind (km/h)
SW
14
SW
13
SW
11
SW
10
SW
8
SSW
8
SSW
7
SSW
5
SSW
7
SSW
9
SSW
8
S
6
SE
4
SE
4
S
5
SSW
9
SW
12
SW
14
SW
17
SW
16
SW
14
SW
15
SW
17
SW
16
Pressure (hPa)
1013
1013
1013
1014
1014
1014
1014
1014
1013
1013
1014
1014
1014
1014
1013
1013
1013
1012
1012
1012
1011
1011
1011
1011
Humidity (%)
69 %
80 %
84 %
86 %
87 %
88 %
89 %
90 %
90 %
91 %
81 %
82 %
79 %
72 %
63 %
56 %
50 %
47 %
46 %
44 %
41 %
39 %
41 %
44 %
Cloud cover (%)
9 %
9 %
9 %
16 %
18 %
26 %
49 %
81 %
100 %
100 %
17 %
17 %
9 %
8 %
8 %
8 %
9 %
9 %
9 %
9 %
9 %
9 %
8 %
8 %

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 20.7°C at night, with daytime highs up to 33.2°C.

Date
Jul 18
Jul 19
Jul 20
Jul 21
Jul 22
Jul 23
Jul 24
Jul 25
Jul 26
Jul 27
Jul 28
Jul 29
Jul 30
Jul 31
Fullerton July 18, 2026: Sunny
Fullerton July 19, 2026: Sunny
Fullerton July 20, 2026: Sunny
Fullerton July 21, 2026: Sunny
Fullerton July 22, 2026: Sunny
Fullerton July 23, 2026: Sunny
Fullerton July 24, 2026: Sunny
Fullerton July 25, 2026: Sunny
Fullerton July 26, 2026: Sunny
Fullerton July 27, 2026: Sunny
Fullerton July 28, 2026: Sunny
Fullerton July 29, 2026: Sunny
Fullerton July 30, 2026: Sunny
Fullerton July 31, 2026: Sunny
Temperature (°C)
Chance of rain (%)
8
5
3
2
1
1
2
4
2
1
1
2
2
1
Precipitation
—
—
—
—
—
—
—
0 mm
—
—
—
—
—
—
Wind max (km/h)
18
17
18
18
17
18
17
17
17
16
17
19
15
17
Date Weather Min °C Max °C Sunrise Sunset Moonrise Moonset Moon phase
July 18, 2026 Fullerton July 18, 2026: Sunny Sunny 21 °C 32 °C 05:53 20:01 10:32 22:51 Waxing Crescent (23 %)
July 19, 2026 Fullerton July 19, 2026: Sunny Sunny 21 °C 29 °C 05:54 20:01 11:39 23:20 First Quarter (33 %)
July 20, 2026 Fullerton July 20, 2026: Sunny Sunny 22 °C 30 °C 05:55 20:00 12:44 23:50 First Quarter (43 %)
July 21, 2026 Fullerton July 21, 2026: Sunny Sunny 23 °C 31 °C 05:55 20:00 13:48 Does not set today First Quarter (53 %)
July 22, 2026 Fullerton July 22, 2026: Sunny Sunny 23 °C 32 °C 05:56 19:59 14:52 00:22 First Quarter (64 %)
July 23, 2026 Fullerton July 23, 2026: Sunny Sunny 24 °C 33 °C 05:57 19:59 15:54 00:58 Waxing Moon (74 %)
July 24, 2026 Fullerton July 24, 2026: Sunny Sunny 24 °C 32 °C 05:57 19:58 16:53 01:40 Waxing Moon (82 %)
July 25, 2026 Fullerton July 25, 2026: Sunny Sunny 23 °C 32 °C 05:58 19:57 17:48 02:27 Waxing Moon (90 %)
July 26, 2026 Fullerton July 26, 2026: Sunny Sunny 23 °C 32 °C 05:59 19:57 18:36 03:19 Waxing Moon (95 %)
July 27, 2026 Fullerton July 27, 2026: Sunny Sunny 24 °C 33 °C 06:00 19:56 19:17 04:16 Full Moon (99 %)
July 28, 2026 Fullerton July 28, 2026: Sunny Sunny 24 °C 33 °C 06:00 19:55 19:53 05:15 Full Moon (100 %)
July 29, 2026 Fullerton July 29, 2026: Sunny Sunny 23 °C 30 °C 06:01 19:54 20:24 06:13 Full Moon (99 %)
July 30, 2026 Fullerton July 30, 2026: Sunny Sunny 23 °C 31 °C 06:02 19:54 20:51 07:11 Waning Moon (96 %)
July 31, 2026 Fullerton July 31, 2026: Sunny Sunny 24 °C 32 °C 06:02 19:53 21:16 08:08 Waning Moon (91 %)
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