Monona Weather in May
Average highs run from 64°F on May 1 to 75°F on May 31, and lows from 40°F to 54°F. Normal precipitation for the month is 4.99 in over about 12 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
- 69°F
- Average low
- 47°F
- Precipitation
- 4.99 in
- Record high
- 109°FMay 31, 1934
- Record low
- 21°FMay 5, 1944
- Chance of a freeze
- 52%
- Days of 90°F or more
- 0.5
- Daylight
- 14 h 08 min to 15 h 09 min
- Cloud cover
- 66%
- Humidity
- 77%
- Dew point
- 50°F
- Wind
- 10.7 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 | 64°F | 40°F | 88°F 1952 | 26°F 1907 | 37% | |
| May 2 | 64°F | 41°F | 94°F 1895 | 29°F 1909 | 37% | |
| May 3 | 65°F | 41°F | 92°F 1901 | 23°F 2005 | 38% | |
| May 4 | 65°F | 41°F | 90°F 1918 | 24°F 1907 | 38% | |
| May 5 | 65°F | 42°F | 91°F 1949 | 21°F 1944 | 38% | |
| May 6 | 66°F | 42°F | 98°F 1934 | 22°F 1989 | 38% | |
| May 7 | 66°F | 43°F | 93°F 1896 | 27°F 1907 | 38% | |
| May 8 | 66°F | 43°F | 94°F 1895 | 28°F 1976 | 38% | |
| May 9 | 67°F | 44°F | 97°F 1895 | 28°F 1945 | 38% | |
| May 10 | 67°F | 44°F | 92°F 1911 | 25°F 1977 | 38% | |
| May 11 | 68°F | 45°F | 91°F 1896 | 30°F 1907 | 38% | |
| May 12 | 68°F | 45°F | 94°F 2022 | 24°F 1895 | 38% | |
| May 13 | 68°F | 46°F | 95°F 2022 | 26°F 1895 | 38% | |
| May 14 | 69°F | 46°F | 92°F 1900 | 23°F 1895 | 38% | |
| May 15 | 69°F | 47°F | 94°F 2013 | 26°F 2016 | 38% | |
| May 16 | 70°F | 47°F | 91°F 2001 | 27°F 1895 | 38% | |
| May 17 | 70°F | 47°F | 93°F 1934 | 32°F 1930 | 38% | |
| May 18 | 70°F | 48°F | 95°F 1934 | 33°F 1944 | 38% | 0% |
| May 19 | 71°F | 48°F | 96°F 1934 | 29°F 1895 | 38% | 0% |
| May 20 | 71°F | 49°F | 96°F 1934 | 32°F 1907 | 38% | 0% |
| May 21 | 71°F | 49°F | 91°F 1972 | 31°F 1895 | 38% | 0% |
| May 22 | 72°F | 50°F | 96°F 1925 | 32°F 1967 | 38% | 0% |
| May 23 | 72°F | 50°F | 91°F 1955 | 30°F 1963 | 38% | 0% |
| May 24 | 72°F | 51°F | 91°F 1896 | 34°F 1917 | 38% | 0% |
| May 25 | 73°F | 51°F | 94°F 1911 | 35°F 1934 | 38% | 0% |
| May 26 | 73°F | 52°F | 94°F 1967 | 34°F 1961 | 39% | 0% |
| May 27 | 73°F | 52°F | 93°F 1978 | 28°F 1895 | 39% | 0% |
| May 28 | 74°F | 52°F | 96°F 2018 | 34°F 1894 | 38% | 0% |
| May 29 | 74°F | 53°F | 97°F 1934 | 30°F 1965 | 38% | 0% |
| May 30 | 75°F | 53°F | 97°F 1934 | 35°F 1981 | 38% | 0% |
| May 31 | 75°F | 54°F | 109°F 1934 | 32°F 1897 | 38% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- May 1
- sunrise 5:59 AM, sunset 8:07 PM
- May 31
- sunrise 5:29 AM, sunset 8:38 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00136766 (Postville), public domain. Records: NOAA GHCN-Daily, station USC00476827, 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.