Fullerton weather in April: Fullerton, California: normal highs, lows, rain and records for April
Fullerton in April has a normal high of 74°F and a normal low of 54°F, a daily mean of 64°F, rising from 73°F on the 1st to 76°F by the 30th. Measurable precipitation falls on 4 days in a normal April, 0.59 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 12°C, 15 mm of precipitation in April.
- NOAA stationFullerton Municipal Airport
- Station IDUSW00003166
- Location33.87°N 117.98°W
- Elevation96 ft (29 m)
- From the center3 miles
- Population140,054
- Jan 69° 46°
- Feb 69° 48°
- Mar 71° 52°
- Apr 74° 54°
- May 76° 58°
- Jun 79° 63°
- Jul 84° 66°
- Aug 87° 66°
- Sep 85° 65°
- Oct 80° 58°
- Nov 74° 51°
- Dec 68° 46°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Fullerton in April?
The normal high is 74°F and the normal low 54°F, for a daily mean of 64.0°F. April is 2.8°F warmer than March and 2.9°F cooler than May. April is the 7th warmest month of the year in Fullerton and the 6th wettest. Across the month the normal high rises 3°F, from 73°F on April 1 to 76°F on April 30. From one year to the next April's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Aprils in three average between 62°F and 66°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 13%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| April 1 | 73°F | 53°F | 13% | 6% |
| April 8 | 73°F | 53°F | 12% | 6% |
| April 15 | 74°F | 54°F | 11% | 5% |
| April 22 | 75°F | 54°F | 10% | 4% |
| April 30 | 76°F | 56°F | 9% | 3% |
Every day of April: normal high, low and chance of precipitation (warmest afternoon April 29, coldest night April 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| April 1 | 73°F | 53°F | 13% | 6% | 12 h 30 min |
| April 2 | 73°F | 53°F | 13% | 6% | 12 h 30 min |
| April 3 | 73°F | 53°F | 13% | 6% | 12 h 40 min |
| April 4 | 73°F | 53°F | 13% | 6% | 12 h 40 min |
| April 5 | 73°F | 53°F | 13% | 6% | 12 h 40 min |
| April 6 | 73°F | 53°F | 13% | 6% | 12 h 40 min |
| April 7 | 73°F | 53°F | 13% | 6% | 12 h 40 min |
| April 8 | 73°F | 53°F | 12% | 6% | 12 h 50 min |
| April 9 | 74°F | 53°F | 12% | 6% | 12 h 50 min |
| April 10 | 74°F | 53°F | 12% | 6% | 12 h 50 min |
| April 11 | 74°F | 53°F | 12% | 5% | 12 h 50 min |
| April 12 | 74°F | 53°F | 12% | 5% | 12 h 50 min |
| April 13 | 74°F | 53°F | 12% | 5% | 13 h |
| April 14 | 74°F | 54°F | 11% | 5% | 13 h |
| April 15 | 74°F | 54°F | 11% | 5% | 13 h |
| April 16 | 74°F | 54°F | 11% | 5% | 13 h |
| April 17 | 75°F | 54°F | 11% | 5% | 13 h |
| April 18 | 75°F | 54°F | 11% | 4% | 13 h 10 min |
| April 19 | 75°F | 54°F | 10% | 4% | 13 h 10 min |
| April 20 | 75°F | 54°F | 10% | 4% | 13 h 10 min |
| April 21 | 75°F | 54°F | 10% | 4% | 13 h 10 min |
| April 22 | 75°F | 54°F | 10% | 4% | 13 h 10 min |
| April 23 | 75°F | 55°F | 10% | 4% | 13 h 20 min |
| April 24 | 75°F | 55°F | 10% | 4% | 13 h 20 min |
| April 25 | 75°F | 55°F | 10% | 4% | 13 h 20 min |
| April 26 | 75°F | 55°F | 9% | 4% | 13 h 20 min |
| April 27 | 75°F | 55°F | 9% | 4% | 13 h 20 min |
| April 28 | 75°F | 55°F | 9% | 4% | 13 h 20 min |
| April 29 | 76°F | 55°F | 9% | 3% | 13 h 30 min |
| April 30 | 76°F | 56°F | 9% | 3% | 13 h 30 min |
- Normal high
- 74°FApril average
- Normal low
- 54°FApril average
- Precipitation
- 0.59 inmonth total
- Days with precipitation
- 40.01 inch or more
- Days at 90°F or more
- 2
- Daylight
- 12 h 30 min to 13 h 30 minApril 1 to April 30
- Days at 70°F or more
- 19
- Days at 80°F or more
- 6
- Sunshine
- 86%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00003166; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Fullerton in April?
On a given April day the chance of 0.01 inch or more is 11% on average, highest around April 1 (13%). In all, 0.59 in falls on 4 days of a normal April.
In a normal April in Fullerton, 2 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00003166.
What are the records for April in Fullerton?
The warmest April temperature on this station's record (since 1998) is 102°F, on April 27, 2004; the coldest is 39°F, on April 10, 1999. The wettest April brought 2.32 in (2020).
The April mean against the 1991-2020 normal of 64.0°F: 2021 65.8°F (+1.8), 2022 66.2°F (+2.2), 2023 64.2°F (+0.2), 2024 61.9°F (−2.1), 2025 62.0°F (−2.0), 2026 65.6°F (+1.6). 4 of 6 ran warmer than normal.
| April | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 65.8°F | +1.8°F | 0.00 in |
| 2022 | 66.2°F | +2.2°F | 0.16 in |
| 2023 | 64.2°F | +0.2°F | 0.00 in |
| 2024 | 61.9°F | −2.1°F | 0.38 in |
| 2025 | 62.0°F | −2.0°F | 0.19 in |
| 2026 | 65.6°F | +1.6°F | 0.42 in |
Source: records: ACIS, station USW00003166; recent months: ACIS, station USW00003166. Records and recent months use complete months only.
How does April in Fullerton compare across California?
Across the 219 places PlainClimate covers in California, April normal highs run from 49°F in Tahoma to 87°F in Brawley; Fullerton's is 74°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.