Clearlake climate

Clearlake Weather in April

NOAA 1991-2020 normals for Clearlake 4 Se, 6.3 km from Clearlake

Average highs run from 64°F on April 1 to 69°F on April 30, and lows from 37°F to 42°F. Normal precipitation for the month is 1.99 in over about 8 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 Clearlake, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

April at a glance

Average high
66°F
Average low
39°F
Precipitation
1.99 in
Record high
94°FApr 26, 2004
Record low
31°FApr 1, 1999
Chance of a freeze
76%
Daylight
12 h 39 min to 13 h 48 min
Cloud cover
47%
Humidity
73%
Dew point
44°F
Wind
6.9 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 164°F37°F84°F 201731°F 199929%0%
Apr 264°F37°F87°F 200035°F 199929%0%
Apr 365°F37°F79°F 202632°F 200329%0%
Apr 465°F38°F82°F 202632°F 200929%0%
Apr 565°F38°F83°F 201632°F 200129%0%
Apr 665°F38°F88°F 201632°F 202029%0%
Apr 765°F38°F90°F 202234°F 200829%0%
Apr 865°F38°F89°F 202232°F 200128%0%
Apr 965°F38°F79°F 202231°F 199928%0%
Apr 1066°F38°F85°F 201335°F 202128%0%
Apr 1166°F39°F85°F 200837°F 200328%0%
Apr 1266°F39°F87°F 200832°F 202228%0%
Apr 1366°F39°F86°F 200834°F 200528%0%
Apr 1466°F39°F87°F 199936°F 200128%0%
Apr 1566°F39°F83°F 199932°F 200127%0%
Apr 1667°F39°F82°F 199933°F 200927%0%
Apr 1767°F40°F84°F 201633°F 201827%0%
Apr 1867°F40°F88°F 202134°F 202227%0%
Apr 1967°F40°F90°F 200934°F 200826%0%
Apr 2067°F40°F93°F 200932°F 200826%0%
Apr 2167°F40°F92°F 200932°F 200825%0%
Apr 2267°F40°F91°F 201336°F 200325%0%
Apr 2368°F41°F93°F 201936°F 200825%0%
Apr 2468°F41°F90°F 202032°F 200825%0%
Apr 2568°F41°F88°F 200437°F 200924%0%
Apr 2668°F41°F94°F 200433°F 202124%0%
Apr 2768°F41°F93°F 200436°F 200324%0%
Apr 2868°F41°F86°F 201334°F 200223%0%
Apr 2969°F42°F92°F 201432°F 200923%0%
Apr 3069°F42°F91°F 201435°F 200923%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Clearlake, 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 6:55 AM, sunset 7:34 PM
April 30
sunrise 6:14 AM, sunset 8:02 PM

Every day of April: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00041806 (Clearlake 4 Se), public domain. Records: NOAA GHCN-Daily, station USW00023213, 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.