Alamo climate

Alamo Weather in April

NOAA 1991-2020 normals for Mt Diablo Junction, 9.5 km from Alamo

Average highs run from 60°F on April 1 to 65°F on April 30, and lows from 43°F to 47°F. Normal precipitation for the month is 1.92 in over about 7 wet days.

April day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Alamo, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

April at a glance

Average high
62°F
Average low
44°F
Precipitation
1.92 in
Record high
94°FApr 26, 2004
Record low
36°FApr 24, 2008
Chance of a freeze
23%
Daylight
12 h 38 min to 13 h 45 min
Cloud cover
44%
Humidity
75%
Dew point
46°F
Wind
8.7 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Apr 160°F43°F86°F 202140°F 202328%0%
Apr 260°F43°F87°F 200039°F 202527%0%
Apr 360°F43°F81°F 200038°F 200127%0%
Apr 460°F43°F81°F 202638°F 200927%0%
Apr 560°F43°F84°F 201638°F 200326%0%
Apr 661°F43°F87°F 201637°F 201226%0%
Apr 761°F43°F87°F 202237°F 201226%0%
Apr 861°F44°F88°F 202237°F 200126%0%
Apr 961°F44°F82°F 200437°F 201125%0%
Apr 1061°F44°F86°F 200440°F 200125%0%
Apr 1161°F44°F83°F 202442°F 200925%0%
Apr 1261°F44°F87°F 200840°F 202224%0%
Apr 1362°F44°F88°F 200840°F 202324%0%
Apr 1462°F44°F84°F 202538°F 200523%0%
Apr 1562°F44°F84°F 202040°F 200123%0%
Apr 1662°F44°F84°F 201640°F 201323%0%
Apr 1762°F44°F85°F 201640°F 200622%0%
Apr 1862°F45°F90°F 202140°F 200622%0%
Apr 1963°F45°F87°F 200940°F 200222%0%
Apr 2063°F45°F93°F 200940°F 200821%0%
Apr 2163°F45°F92°F 200940°F 200121%0%
Apr 2263°F45°F89°F 200943°F 200420%0%
Apr 2363°F45°F92°F 201943°F 200720%0%
Apr 2463°F45°F92°F 201936°F 200820%0%
Apr 2564°F46°F89°F 200444°F 200320%0%
Apr 2664°F46°F94°F 200442°F 202119%0%
Apr 2764°F46°F94°F 200441°F 200319%0%
Apr 2864°F46°F89°F 200741°F 200219%0%
Apr 2964°F46°F90°F 201339°F 201118%0%
Apr 3065°F47°F91°F 201542°F 200218%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Alamo, in percent, and of at least 0.1 inch of snowfall.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PDT).

April 1
sunrise 6:53 AM, sunset 7:31 PM
April 30
sunrise 6:13 AM, sunset 7:58 PM

Every day of April: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00045915 (Mt Diablo Junction), public domain. Records: NOAA GHCN-Daily, station USW00023254, 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.