McHenry County Weather in April
Average highs run from 54°F on April 1 to 65°F on April 30, and lows from 33°F to 41°F. Normal precipitation for the month is 3.76 in over about 11 wet days.
April day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
April at a glance
- Average high
- 59°F
- Average low
- 37°F
- Precipitation
- 3.76 in
- Snowfall
- 1.2 in
- Record high
- 90°FApr 23, 1980
- Record low
- 3°FApr 7, 1982
- Chance of a freeze
- 99%
- Daylight
- 12 h 44 min to 14 h 02 min
- Cloud cover
- 66%
- Humidity
- 77%
- Dew point
- 38°F
- Wind
- 12.3 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 |
|---|---|---|---|---|---|---|
| Apr 1 | 54°F | 33°F | 82°F 1986 | 12°F 1969 | 32% | 5% |
| Apr 2 | 54°F | 33°F | 81°F 2010 | 18°F 2018 | 32% | 5% |
| Apr 3 | 55°F | 33°F | 82°F 1963 | 12°F 1954 | 33% | 5% |
| Apr 4 | 55°F | 34°F | 79°F 1956 | 14°F 1982 | 33% | 5% |
| Apr 5 | 56°F | 34°F | 74°F 1997 | 12°F 1995 | 33% | 4% |
| Apr 6 | 56°F | 34°F | 77°F 1991 | 9°F 1979 | 33% | 4% |
| Apr 7 | 56°F | 35°F | 84°F 1991 | 3°F 1982 | 34% | 4% |
| Apr 8 | 57°F | 35°F | 80°F 1991 | 15°F 1996 | 34% | 4% |
| Apr 9 | 57°F | 35°F | 74°F 1991 | 14°F 2003 | 34% | 4% |
| Apr 10 | 57°F | 35°F | 73°F 1955 | 17°F 1997 | 35% | 4% |
| Apr 11 | 58°F | 36°F | 82°F 1977 | 17°F 1973 | 35% | 4% |
| Apr 12 | 58°F | 36°F | 83°F 1977 | 20°F 1975 | 35% | 4% |
| Apr 13 | 58°F | 36°F | 81°F 1977 | 21°F 1957 | 35% | 3% |
| Apr 14 | 59°F | 36°F | 81°F 2023 | 19°F 1953 | 36% | 3% |
| Apr 15 | 59°F | 37°F | 83°F 2003 | 21°F 1957 | 36% | 3% |
| Apr 16 | 59°F | 37°F | 88°F 2002 | 21°F 2014 | 36% | 3% |
| Apr 17 | 60°F | 37°F | 86°F 2002 | 22°F 2020 | 36% | 3% |
| Apr 18 | 60°F | 37°F | 86°F 1977 | 22°F 1953 | 37% | 3% |
| Apr 19 | 60°F | 38°F | 89°F 2002 | 19°F 1983 | 37% | 2% |
| Apr 20 | 61°F | 38°F | 86°F 1985 | 21°F 1956 | 37% | 2% |
| Apr 21 | 61°F | 38°F | 86°F 1987 | 24°F 1953 | 37% | 2% |
| Apr 22 | 61°F | 38°F | 85°F 1985 | 22°F 1978 | 37% | 2% |
| Apr 23 | 62°F | 39°F | 90°F 1980 | 24°F 2021 | 38% | 2% |
| Apr 24 | 62°F | 39°F | 84°F 1960 | 25°F 2015 | 38% | 2% |
| Apr 25 | 63°F | 39°F | 86°F 1990 | 25°F 2015 | 38% | 2% |
| Apr 26 | 63°F | 40°F | 87°F 1990 | 24°F 2023 | 38% | 2% |
| Apr 27 | 63°F | 40°F | 87°F 1990 | 24°F 2023 | 38% | 2% |
| Apr 28 | 64°F | 40°F | 86°F 1986 | 26°F 1994 | 38% | 2% |
| Apr 29 | 64°F | 41°F | 81°F 2025 | 22°F 1977 | 38% | 1% |
| Apr 30 | 65°F | 41°F | 85°F 1970 | 26°F 1969 | 38% | 1% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- April 1
- sunrise 6:36 AM, sunset 7:20 PM
- April 30
- sunrise 5:50 AM, sunset 7:52 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00112048 (Crystal Lake 4NW), public domain. Records: NOAA GHCN-Daily, station USC00471205, 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.