Chester Weather in May
Average highs run from 72°F on May 1 to 82°F on May 31, and lows from 50°F to 60°F. Normal precipitation for the month is 5.18 in over about 11 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
- 77°F
- Average low
- 55°F
- Precipitation
- 5.18 in
- Record high
- 98°FMay 21, 1998
- Record low
- 31°FMay 3, 1976
- Chance of a freeze
- 4%
- Days of 90°F or more
- 3.0
- Daylight
- 13 h 47 min to 14 h 36 min
- Cloud cover
- 63%
- Humidity
- 79%
- Dew point
- 58°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.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| May 1 | 72°F | 50°F | 89°F 2007 | 37°F 1979 | 37% | 0% |
| May 2 | 73°F | 50°F | 90°F 1987 | 32°F 1978 | 37% | 0% |
| May 3 | 73°F | 50°F | 91°F 2012 | 31°F 1976 | 37% | 0% |
| May 4 | 73°F | 51°F | 87°F 2001 | 34°F 1976 | 38% | 0% |
| May 5 | 74°F | 51°F | 88°F 2001 | 36°F 2011 | 38% | 0% |
| May 6 | 74°F | 51°F | 93°F 2014 | 33°F 1989 | 38% | 0% |
| May 7 | 74°F | 52°F | 93°F 2012 | 33°F 1989 | 38% | 0% |
| May 8 | 75°F | 52°F | 95°F 2004 | 36°F 1976 | 38% | 0% |
| May 9 | 75°F | 53°F | 94°F 1986 | 35°F 1976 | 38% | 0% |
| May 10 | 75°F | 53°F | 90°F 1986 | 36°F 2020 | 38% | 0% |
| May 11 | 75°F | 53°F | 92°F 1987 | 37°F 1990 | 37% | 0% |
| May 12 | 76°F | 54°F | 94°F 1998 | 36°F 1989 | 37% | 0% |
| May 13 | 76°F | 54°F | 91°F 1988 | 39°F 2006 | 37% | 0% |
| May 14 | 76°F | 54°F | 92°F 1987 | 41°F 2021 | 37% | 0% |
| May 15 | 77°F | 55°F | 96°F 1987 | 38°F 2019 | 37% | 0% |
| May 16 | 77°F | 55°F | 90°F 1982 | 39°F 1997 | 36% | 0% |
| May 17 | 77°F | 55°F | 92°F 1989 | 39°F 1997 | 36% | 0% |
| May 18 | 78°F | 56°F | 95°F 2001 | 40°F 2002 | 36% | 0% |
| May 19 | 78°F | 56°F | 94°F 1998 | 39°F 2002 | 35% | 0% |
| May 20 | 78°F | 56°F | 96°F 1987 | 43°F 1981 | 35% | 0% |
| May 21 | 79°F | 57°F | 98°F 1998 | 42°F 2002 | 35% | 0% |
| May 22 | 79°F | 57°F | 92°F 1987 | 39°F 2019 | 34% | 0% |
| May 23 | 79°F | 57°F | 92°F 1975 | 43°F 1985 | 34% | 0% |
| May 24 | 80°F | 58°F | 93°F 2004 | 44°F 1992 | 34% | 0% |
| May 25 | 80°F | 58°F | 94°F 1996 | 44°F 1976 | 33% | 0% |
| May 26 | 80°F | 58°F | 93°F 1978 | 40°F 1988 | 33% | 0% |
| May 27 | 81°F | 59°F | 95°F 2012 | 41°F 1988 | 33% | 0% |
| May 28 | 81°F | 59°F | 96°F 2012 | 47°F 1992 | 32% | 0% |
| May 29 | 81°F | 59°F | 97°F 1991 | 41°F 1984 | 32% | 0% |
| May 30 | 82°F | 60°F | 97°F 1991 | 42°F 1984 | 32% | 0% |
| May 31 | 82°F | 60°F | 93°F 1998 | 44°F 1984 | 31% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- May 1
- sunrise 6:03 AM, sunset 7:50 PM
- May 31
- sunrise 5:39 AM, sunset 8:15 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00114629 (Kaskaskia Rvr Navigation Lock), public domain. Records: NOAA GHCN-Daily, station USC00114629, 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.