Upland Weather in April
Average highs run from 74°F on April 1 to 78°F on April 30, and lows from 50°F to 53°F. Normal precipitation for the month is 0.76 in over about 4 wet days.
April day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
April at a glance
- Average high
- 76°F
- Average low
- 51°F
- Precipitation
- 0.76 in
- Record high
- 104°FApr 6, 1989
- Record low
- 29°FApr 6, 1921
- Chance of a freeze
- 0%
- Days of 90°F or more
- 2.6
- Daylight
- 12 h 34 min to 13 h 32 min
- Cloud cover
- 32%
- Humidity
- 58%
- Dew point
- 40°F
- Wind
- 6.7 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Apr 1 | 74°F | 50°F | 94°F 1959 | 30°F 1897 | 14% |
| Apr 2 | 74°F | 50°F | 93°F 1985 | 31°F 1956 | 14% |
| Apr 3 | 74°F | 50°F | 99°F 1961 | 30°F 1898 | 14% |
| Apr 4 | 74°F | 50°F | 97°F 1989 | 30°F 1945 | 13% |
| Apr 5 | 74°F | 50°F | 101°F 1989 | 31°F 1945 | 13% |
| Apr 6 | 74°F | 50°F | 104°F 1989 | 29°F 1921 | 13% |
| Apr 7 | 74°F | 50°F | 104°F 1989 | 30°F 1929 | 13% |
| Apr 8 | 75°F | 50°F | 96°F 1899 | 32°F 1929 | 13% |
| Apr 9 | 75°F | 50°F | 93°F 1988 | 29°F 1953 | 13% |
| Apr 10 | 75°F | 50°F | 96°F 1988 | 30°F 1945 | 13% |
| Apr 11 | 75°F | 50°F | 95°F 1936 | 30°F 1953 | 12% |
| Apr 12 | 75°F | 50°F | 99°F 1940 | 31°F 1953 | 12% |
| Apr 13 | 75°F | 51°F | 100°F 1898 | 31°F 1922 | 12% |
| Apr 14 | 75°F | 51°F | 98°F 1947 | 31°F 1921 | 12% |
| Apr 15 | 76°F | 51°F | 98°F 1966 | 29°F 1921 | 12% |
| Apr 16 | 76°F | 51°F | 94°F 1948 | 32°F 1921 | 11% |
| Apr 17 | 76°F | 51°F | 95°F 1938 | 30°F 1922 | 11% |
| Apr 18 | 76°F | 51°F | 96°F 1939 | 31°F 1917 | 11% |
| Apr 19 | 76°F | 51°F | 98°F 1914 | 31°F 1933 | 11% |
| Apr 20 | 76°F | 52°F | 98°F 2009 | 31°F 1896 | 11% |
| Apr 21 | 77°F | 52°F | 100°F 2009 | 31°F 1896 | 11% |
| Apr 22 | 77°F | 52°F | 100°F 2009 | 33°F 1920 | 10% |
| Apr 23 | 77°F | 52°F | 100°F 2009 | 35°F 1920 | 10% |
| Apr 24 | 77°F | 52°F | 102°F 1898 | 33°F 1921 | 10% |
| Apr 25 | 77°F | 53°F | 104°F 1898 | 33°F 1921 | 10% |
| Apr 26 | 77°F | 53°F | 100°F 1898 | 36°F 1920 | 10% |
| Apr 27 | 77°F | 53°F | 101°F 2004 | 36°F 1945 | 10% |
| Apr 28 | 78°F | 53°F | 98°F 1921 | 35°F 1900 | 9% |
| Apr 29 | 78°F | 53°F | 96°F 1965 | 34°F 1937 | 9% |
| Apr 30 | 78°F | 53°F | 93°F 1943 | 34°F 1951 | 9% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- April 1
- sunrise 6:38 AM, sunset 7:12 PM
- April 30
- sunrise 6:02 AM, sunset 7:34 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00003102 (Ontario Intl AP), public domain. Records: NOAA GHCN-Daily, station USC00047050, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.