Harper County Weather in May
Average highs run from 75°F on May 1 to 85°F on May 31, and lows from 48°F to 59°F. Normal precipitation for the month is 2.31 in over about 6 wet days.
May day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
May at a glance
- Average high
- 80°F
- Average low
- 53°F
- Precipitation
- 2.31 in
- Record high
- 105°FMay 18, 1996
- Record low
- 27°FMay 4, 2008
- Chance of a freeze
- 10%
- Days of 90°F or more
- 8.7
- Daylight
- 13 h 42 min to 14 h 31 min
- Cloud cover
- 56%
- Humidity
- 60%
- Dew point
- 51°F
- Wind
- 11.6 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.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| May 1 | 75°F | 48°F | 95°F 2002 | 31°F 1984 | 20% | 0% |
| May 2 | 76°F | 48°F | 97°F 1992 | 31°F 2011 | 20% | 0% |
| May 3 | 76°F | 49°F | 94°F 1950 | 32°F 2002 | 20% | 0% |
| May 4 | 76°F | 49°F | 96°F 1950 | 27°F 2008 | 19% | 0% |
| May 5 | 76°F | 49°F | 95°F 1943 | 38°F 1979 | 19% | 0% |
| May 6 | 77°F | 50°F | 93°F 2004 | 35°F 1944 | 19% | 0% |
| May 7 | 77°F | 50°F | 100°F 2000 | 35°F 1960 | 19% | 0% |
| May 8 | 77°F | 51°F | 94°F 1948 | 31°F 2010 | 19% | 0% |
| May 9 | 78°F | 51°F | 103°F 2011 | 38°F 2003 | 19% | 0% |
| May 10 | 78°F | 51°F | 101°F 2011 | 34°F 1981 | 19% | 0% |
| May 11 | 78°F | 52°F | 102°F 1963 | 32°F 1946 | 19% | 0% |
| May 12 | 79°F | 52°F | 97°F 1970 | 34°F 1960 | 19% | 0% |
| May 13 | 79°F | 52°F | 95°F 1970 | 30°F 1966 | 19% | 0% |
| May 14 | 79°F | 53°F | 94°F 2003 | 33°F 2011 | 19% | 0% |
| May 15 | 80°F | 53°F | 97°F 1952 | 34°F 2004 | 19% | 0% |
| May 16 | 80°F | 53°F | 98°F 1966 | 32°F 2011 | 20% | 0% |
| May 17 | 80°F | 54°F | 100°F 1996 | 34°F 2009 | 20% | 0% |
| May 18 | 81°F | 54°F | 105°F 1996 | 40°F 2002 | 20% | 0% |
| May 19 | 81°F | 55°F | 98°F 1956 | 40°F 1971 | 20% | 0% |
| May 20 | 81°F | 55°F | 103°F 2006 | 43°F 1981 | 20% | 0% |
| May 21 | 82°F | 55°F | 103°F 2006 | 39°F 2001 | 20% | 0% |
| May 22 | 82°F | 56°F | 100°F 1948 | 44°F 1963 | 20% | 0% |
| May 23 | 82°F | 56°F | 104°F 2000 | 36°F 2001 | 21% | 0% |
| May 24 | 83°F | 56°F | 105°F 1996 | 37°F 2001 | 21% | 0% |
| May 25 | 83°F | 57°F | 100°F 1962 | 42°F 2001 | 21% | 0% |
| May 26 | 83°F | 57°F | 100°F 1945 | 41°F 2011 | 21% | 0% |
| May 27 | 84°F | 58°F | 98°F 1953 | 44°F 1992 | 21% | 0% |
| May 28 | 84°F | 58°F | 96°F 1942 | 42°F 1992 | 21% | 0% |
| May 29 | 84°F | 58°F | 99°F 2006 | 36°F 1947 | 21% | 0% |
| May 30 | 85°F | 59°F | 100°F 1998 | 42°F 1947 | 22% | 0% |
| May 31 | 85°F | 59°F | 102°F 1953 | 36°F 2004 | 22% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- May 1
- sunrise 6:45 AM, sunset 8:27 PM
- May 31
- sunrise 6:21 AM, sunset 8:52 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00341243 (Buffalo 2 Ssw), public domain. Records: NOAA GHCN-Daily, station USC00343304, 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.