Knox County Weather in May
Average highs run from 81°F on May 1 to 90°F on May 31, and lows from 53°F to 65°F. Normal precipitation for the month is 3.48 in over about 7 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
- 85°F
- Average low
- 59°F
- Precipitation
- 3.48 in
- Record high
- 111°FMay 24, 2000
- Record low
- 35°FMay 13, 2002
- Chance of a freeze
- 0%
- Days of 90°F or more
- 11.7
- Daylight
- 13 h 32 min to 14 h 14 min
- Cloud cover
- 52%
- Humidity
- 59%
- Dew point
- 56°F
- Wind
- 11.4 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 | 81°F | 53°F | 100°F 1948 | 38°F 1994 | 20% | 0% |
| May 2 | 81°F | 54°F | 99°F 1943 | 39°F 1960 | 20% | 0% |
| May 3 | 81°F | 54°F | 100°F 1947 | 38°F 1954 | 20% | 0% |
| May 4 | 82°F | 54°F | 101°F 1996 | 38°F 1954 | 20% | 0% |
| May 5 | 82°F | 55°F | 100°F 1940 | 41°F 1935 | 21% | 0% |
| May 6 | 82°F | 55°F | 98°F 1983 | 40°F 1944 | 21% | 0% |
| May 7 | 83°F | 56°F | 100°F 2000 | 42°F 1982 | 21% | 0% |
| May 8 | 83°F | 56°F | 104°F 2000 | 36°F 1984 | 21% | 0% |
| May 9 | 83°F | 56°F | 101°F 1989 | 42°F 1990 | 21% | 0% |
| May 10 | 83°F | 57°F | 105°F 1967 | 44°F 1969 | 21% | 0% |
| May 11 | 84°F | 57°F | 105°F 1963 | 41°F 1981 | 22% | 0% |
| May 12 | 84°F | 58°F | 105°F 2000 | 39°F 1979 | 22% | 0% |
| May 13 | 84°F | 58°F | 97°F 2004 | 35°F 2002 | 22% | 0% |
| May 14 | 85°F | 58°F | 104°F 1952 | 36°F 2002 | 22% | 0% |
| May 15 | 85°F | 59°F | 103°F 1952 | 39°F 1942 | 22% | 0% |
| May 16 | 85°F | 59°F | 103°F 1974 | 42°F 1945 | 22% | 0% |
| May 17 | 85°F | 60°F | 105°F 2000 | 42°F 1945 | 22% | 0% |
| May 18 | 86°F | 60°F | 100°F 1944 | 40°F 2002 | 23% | 0% |
| May 19 | 86°F | 60°F | 102°F 1959 | 46°F 1971 | 23% | 0% |
| May 20 | 86°F | 61°F | 106°F 1956 | 45°F 1981 | 23% | 0% |
| May 21 | 87°F | 61°F | 103°F 2006 | 45°F 1967 | 23% | 0% |
| May 22 | 87°F | 62°F | 106°F 1939 | 44°F 1967 | 23% | 0% |
| May 23 | 87°F | 62°F | 102°F 1939 | 47°F 1968 | 23% | 0% |
| May 24 | 88°F | 62°F | 111°F 2000 | 47°F 1968 | 23% | 0% |
| May 25 | 88°F | 63°F | 111°F 2000 | 47°F 1968 | 23% | 0% |
| May 26 | 88°F | 63°F | 101°F 1984 | 50°F 1950 | 23% | 0% |
| May 27 | 89°F | 63°F | 104°F 1953 | 46°F 1961 | 23% | 0% |
| May 28 | 89°F | 64°F | 106°F 1958 | 51°F 1976 | 23% | 0% |
| May 29 | 89°F | 64°F | 103°F 1974 | 42°F 1947 | 23% | 0% |
| May 30 | 89°F | 64°F | 106°F 1985 | 47°F 1947 | 23% | 0% |
| May 31 | 90°F | 65°F | 106°F 1985 | 47°F 1947 | 23% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- May 1
- sunrise 6:50 AM, sunset 8:22 PM
- May 31
- sunrise 6:30 AM, sunset 8:44 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00419163 (Truscott 3 W), public domain. Records: NOAA GHCN-Daily, station USC00419346, 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.