Sweetwater County climate

Sweetwater County Weather in April

NOAA 1991-2020 normals for Rock Springs AP, 16.2 km from Sweetwater County

Average highs run from 49°F on April 1 to 57°F on April 30, and lows from 27°F to 33°F. Normal precipitation for the month is 0.91 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 Sweetwater County, in °F, with the record for each date.020406080151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

April at a glance

Average high
53°F
Average low
30°F
Precipitation
0.91 in
Snowfall
8.8 in
Record high
79°FApr 20, 1989
Record low
2°FApr 2, 1975
Chance of a freeze
100%
Daylight
12 h 43 min to 14 h 00 min
Cloud cover
62%
Humidity
55%
Dew point
22°F
Wind
12.5 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 149°F27°F64°F 19967°F 197526%20%
Apr 250°F28°F69°F 20112°F 197526%20%
Apr 350°F28°F71°F 202111°F 195526%20%
Apr 450°F28°F71°F 20218°F 195027%20%
Apr 550°F28°F72°F 199111°F 195527%20%
Apr 650°F28°F71°F 199112°F 202327%20%
Apr 751°F28°F70°F 198810°F 197327%20%
Apr 851°F28°F72°F 19777°F 197327%20%
Apr 951°F28°F71°F 19969°F 201327%20%
Apr 1051°F29°F73°F 20126°F 201327%20%
Apr 1152°F29°F76°F 20255°F 199727%20%
Apr 1252°F29°F72°F 20255°F 199727%20%
Apr 1352°F29°F72°F 19888°F 202027%20%
Apr 1452°F29°F72°F 198511°F 201427%20%
Apr 1553°F29°F73°F 198516°F 199928%20%
Apr 1653°F30°F71°F 198514°F 202028%19%
Apr 1753°F30°F76°F 198711°F 202028%19%
Apr 1853°F30°F73°F 198112°F 196628%19%
Apr 1954°F30°F75°F 19897°F 196628%19%
Apr 2054°F30°F79°F 19896°F 196628%18%
Apr 2154°F31°F77°F 198914°F 197028%18%
Apr 2254°F31°F76°F 201216°F 201328%18%
Apr 2355°F31°F79°F 201211°F 201328%17%
Apr 2455°F31°F78°F 201215°F 195828%17%
Apr 2555°F32°F74°F 197719°F 202628%17%
Apr 2656°F32°F77°F 197715°F 198428%16%
Apr 2756°F32°F76°F 199215°F 198428%16%
Apr 2856°F32°F76°F 200717°F 195528%15%
Apr 2957°F33°F79°F 200717°F 195028%15%
Apr 3057°F33°F78°F 202115°F 196728%14%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Sweetwater County, 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 (MDT).

April 1
sunrise 6:58 AM, sunset 7:41 PM
April 30
sunrise 6:13 AM, sunset 8:13 PM

Every day of April: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00024027 (Rock Springs AP), public domain. Records: NOAA GHCN-Daily, station USW00024027, 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.