McHenry County Weather in July
Average highs run from 83°F on July 1 to 85°F on July 31, and lows from 61°F to 64°F. Normal precipitation for the month is 3.90 in over about 9 wet days.
July day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
July at a glance
- Average high
- 84°F
- Average low
- 63°F
- Precipitation
- 3.90 in
- Record high
- 105°FJul 14, 1995
- Record low
- 39°FJul 5, 1972
- Chance of a freeze
- 0%
- Days of 90°F or more
- 7.7
- Daylight
- 15 h 13 min to 14 h 28 min
- Cloud cover
- 52%
- Humidity
- 77%
- Dew point
- 63°F
- Wind
- 8.3 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 |
|---|---|---|---|---|---|---|
| Jul 1 | 83°F | 61°F | 97°F 1953 | 42°F 2001 | 30% | 0% |
| Jul 2 | 83°F | 61°F | 98°F 1953 | 43°F 2001 | 30% | 0% |
| Jul 3 | 83°F | 61°F | 97°F 1970 | 45°F 1968 | 30% | 0% |
| Jul 4 | 83°F | 61°F | 96°F 2012 | 43°F 1963 | 30% | 0% |
| Jul 5 | 83°F | 61°F | 101°F 2012 | 39°F 1972 | 30% | 0% |
| Jul 6 | 83°F | 61°F | 102°F 2012 | 43°F 1967 | 29% | 0% |
| Jul 7 | 83°F | 61°F | 101°F 2012 | 45°F 1979 | 29% | 0% |
| Jul 8 | 83°F | 62°F | 95°F 1988 | 45°F 1983 | 29% | 0% |
| Jul 9 | 84°F | 62°F | 95°F 1974 | 45°F 1963 | 29% | 0% |
| Jul 10 | 84°F | 62°F | 97°F 1989 | 44°F 1963 | 29% | 0% |
| Jul 11 | 84°F | 62°F | 101°F 1966 | 44°F 1968 | 29% | 0% |
| Jul 12 | 84°F | 62°F | 95°F 1976 | 43°F 1975 | 29% | 0% |
| Jul 13 | 84°F | 62°F | 94°F 1954 | 48°F 1993 | 29% | 0% |
| Jul 14 | 84°F | 62°F | 105°F 1995 | 48°F 2002 | 29% | 0% |
| Jul 15 | 84°F | 63°F | 105°F 1995 | 45°F 1967 | 29% | 0% |
| Jul 16 | 84°F | 63°F | 101°F 1988 | 46°F 1973 | 29% | 0% |
| Jul 17 | 84°F | 63°F | 97°F 2012 | 46°F 1958 | 29% | 0% |
| Jul 18 | 84°F | 63°F | 99°F 2012 | 47°F 1979 | 29% | 0% |
| Jul 19 | 85°F | 63°F | 95°F 1991 | 47°F 2003 | 29% | 0% |
| Jul 20 | 85°F | 63°F | 98°F 1991 | 48°F 2003 | 29% | 0% |
| Jul 21 | 85°F | 63°F | 97°F 2011 | 46°F 1958 | 29% | 0% |
| Jul 22 | 85°F | 63°F | 97°F 2002 | 47°F 2007 | 29% | 0% |
| Jul 23 | 85°F | 63°F | 94°F 1955 | 46°F 2000 | 29% | 0% |
| Jul 24 | 85°F | 64°F | 96°F 2012 | 46°F 2000 | 29% | 0% |
| Jul 25 | 85°F | 64°F | 97°F 1964 | 46°F 2000 | 29% | 0% |
| Jul 26 | 85°F | 64°F | 94°F 2012 | 48°F 1962 | 29% | 0% |
| Jul 27 | 85°F | 64°F | 99°F 1955 | 45°F 1977 | 29% | 0% |
| Jul 28 | 85°F | 64°F | 99°F 1955 | 47°F 1981 | 29% | 0% |
| Jul 29 | 85°F | 64°F | 96°F 1988 | 46°F 1993 | 29% | 0% |
| Jul 30 | 85°F | 64°F | 95°F 1999 | 48°F 1956 | 29% | 0% |
| Jul 31 | 85°F | 64°F | 100°F 1999 | 48°F 1971 | 29% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- July 1
- sunrise 5:21 AM, sunset 8:34 PM
- July 31
- sunrise 5:46 AM, sunset 8:14 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.