Delta climate

Delta Weather in May

NOAA 1991-2020 normals for Delta 3E, 3.8 km from Delta

Average highs run from 71°F on May 1 to 82°F on May 31, and lows from 40°F to 47°F.

May day by day

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

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

May at a glance

Average high
76°F
Average low
44°F
Snowfall
0.5 in
Record high
98°FMay 29, 2000
Record low
25°FMay 1, 2011
Chance of a freeze
52%
Days of 90°F or more
2.0
Daylight
13 h 50 min to 14 h 41 min
Cloud cover
60%
Humidity
46%
Dew point
30°F
Wind
7.4 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
May 171°F40°F87°F 202025°F 20112%
May 271°F40°F89°F 202025°F 20112%
May 371°F40°F85°F 200029°F 20112%
May 472°F40°F89°F 200035°F 20012%
May 572°F41°F90°F 200025°F 20081%
May 673°F41°F88°F 200026°F 20131%
May 773°F41°F85°F 202230°F 20101%
May 873°F42°F86°F 202131°F 20241%
May 974°F42°F86°F 201827°F 20021%
May 1074°F42°F87°F 201829°F 20031%
May 1174°F42°F89°F 201829°F 20031%
May 1275°F43°F88°F 200731°F 20001%
May 1375°F43°F88°F 200733°F 20141%
May 1476°F43°F87°F 201331°F 20141%
May 1576°F43°F88°F 201336°F 20141%
May 1676°F44°F89°F 202236°F 20101%
May 1777°F44°F88°F 201341°F 20101%
May 1877°F44°F89°F 200632°F 20170%
May 1978°F44°F93°F 200933°F 20170%
May 2078°F45°F91°F 200633°F 20170%
May 2178°F45°F95°F 200535°F 20220%
May 2279°F45°F92°F 200533°F 20020%
May 2379°F45°F93°F 200532°F 20240%
May 2480°F46°F93°F 200533°F 20210%
May 2580°F46°F91°F 200535°F 20100%
May 2680°F46°F90°F 200335°F 20100%
May 2781°F46°F93°F 201834°F 20090%
May 2881°F47°F93°F 200341°F 20160%
May 2982°F47°F98°F 200035°F 20060%
May 3082°F47°F98°F 200039°F 20070%
May 3182°F47°F98°F 200035°F 20110%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Delta, in percent, and of at least 0.1 inch of snowfall.00.511.521102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (MDT).

May 1
sunrise 6:15 AM, sunset 8:05 PM
May 31
sunrise 5:50 AM, sunset 8:31 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00052196 (Delta 3E), public domain. Records: NOAA GHCN-Daily, station USC00052196, 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.