Glenrock climate

Glenrock Weather in May

NOAA 1991-2020 normals for Casper 1SW, 33.6 km from Glenrock

Average highs run from 59°F on May 1 to 71°F on May 31, and lows from 34°F to 46°F. Normal precipitation for the month is 2.77 in.

May day by day

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

Normal daily high and low temperature at Glenrock, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
65°F
Average low
40°F
Precipitation
2.77 in
Record high
97°FMay 29, 2003
Record low
16°FMay 9, 2002
Chance of a freeze
85%
Daylight
14 h 07 min to 15 h 07 min
Cloud cover
65%
Humidity
55%
Dew point
35°F
Wind
10.1 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation.

DateNormal highNormal lowRecord highRecord lowChance wet
May 159°F34°F81°F 202122°F 2011
May 259°F34°F81°F 200017°F 2005
May 359°F34°F82°F 202317°F 2008
May 460°F35°F86°F 200019°F 2024
May 560°F35°F89°F 200022°F 2010
May 660°F35°F85°F 201721°F 2026
May 761°F36°F85°F 200422°F 2001
May 861°F36°F84°F 200421°F 2010
May 961°F37°F82°F 201216°F 2002
May 1062°F37°F85°F 201225°F 2006
May 1162°F38°F87°F 202626°F 2006
May 1263°F38°F87°F 200723°F 2005
May 1363°F38°F92°F 202621°F 2000
May 1464°F39°F90°F 201324°F 2004
May 1564°F39°F82°F 201230°F 2004
May 1664°F40°F92°F 201232°F 2009
May 1765°F40°F84°F 201231°F 2016
May 1865°F41°F88°F 202031°F 2019
May 1966°F41°F92°F 200927°F 2026
May 2066°F42°F89°F 200526°F 2003
May 2167°F42°F85°F 200627°F 2022
May 2267°F43°F90°F 201225°F 2022
May 2368°F43°F85°F 200331°F 2007
May 2468°F43°F82°F 201731°F 2001
May 2569°F44°F86°F 201330°F 2002
May 2669°F44°F92°F 200631°F 2007
May 2770°F45°F89°F 200634°F 2011
May 2870°F45°F88°F 200031°F 2005
May 2970°F45°F97°F 200333°F 2012
May 3071°F46°F93°F 200232°F 2010
May 3171°F46°F92°F 202034°F 2022

Chance of rain

Sunrise and sunset

Times for 2026, local time (MDT).

May 1
sunrise 5:57 AM, sunset 8:04 PM
May 31
sunrise 5:28 AM, sunset 8:35 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00481572 (Casper 1SW), public domain. Records: NOAA GHCN-Daily, station USW00094057, 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.