McHenry County Weather in March
Average highs run from 28°F on March 1 to 45°F on March 31, and lows from 5°F to 21°F. Normal precipitation for the month is 0.78 in over about 3 wet days.
March day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
March at a glance
- Average high
- 36°F
- Average low
- 13°F
- Precipitation
- 0.78 in
- Snowfall
- 4.6 in
- Record high
- 79°FMar 30, 1966
- Record low
- -29°FMar 1, 1962
- Chance of a freeze
- 100%
- Daylight
- 11 h 04 min to 12 h 50 min
- Cloud cover
- 65%
- Humidity
- 72%
- Dew point
- 20°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 |
|---|---|---|---|---|---|---|
| Mar 1 | 28°F | 5°F | 66°F 1992 | -29°F 1962 | 10% | 9% |
| Mar 2 | 29°F | 5°F | 53°F 2025 | -23°F 2003 | 10% | 9% |
| Mar 3 | 29°F | 6°F | 56°F 2000 | -13°F 1952 | 10% | 8% |
| Mar 4 | 29°F | 6°F | 65°F 2000 | -15°F 1952 | 10% | 8% |
| Mar 5 | 30°F | 7°F | 66°F 2000 | -22°F 1955 | 10% | 8% |
| Mar 6 | 30°F | 7°F | 73°F 2016 | -20°F 1951 | 10% | 8% |
| Mar 7 | 31°F | 8°F | 60°F 2016 | -16°F 1951 | 10% | 8% |
| Mar 8 | 31°F | 8°F | 64°F 2021 | -19°F 1951 | 10% | 8% |
| Mar 9 | 32°F | 9°F | 59°F 2016 | -21°F 1951 | 10% | 8% |
| Mar 10 | 32°F | 9°F | 67°F 2016 | -15°F 2002 | 10% | 7% |
| Mar 11 | 33°F | 10°F | 66°F 2016 | -17°F 1998 | 10% | 7% |
| Mar 12 | 33°F | 11°F | 70°F 2007 | -15°F 1951 | 10% | 7% |
| Mar 13 | 34°F | 11°F | 70°F 2016 | -11°F 1951 | 9% | 7% |
| Mar 14 | 34°F | 12°F | 74°F 2016 | -9°F 1949 | 9% | 7% |
| Mar 15 | 35°F | 12°F | 64°F 2012 | -10°F 1997 | 9% | 7% |
| Mar 16 | 35°F | 13°F | 73°F 2012 | -12°F 2013 | 9% | 7% |
| Mar 17 | 36°F | 13°F | 69°F 2012 | -6°F 1965 | 9% | 7% |
| Mar 18 | 37°F | 14°F | 77°F 2012 | -9°F 1965 | 9% | 7% |
| Mar 19 | 37°F | 14°F | 71°F 2026 | -6°F 1955 | 9% | 7% |
| Mar 20 | 38°F | 15°F | 67°F 2021 | -10°F 2013 | 9% | 7% |
| Mar 21 | 38°F | 16°F | 68°F 1986 | -8°F 1964 | 10% | 6% |
| Mar 22 | 39°F | 16°F | 74°F 2012 | -9°F 1965 | 10% | 6% |
| Mar 23 | 40°F | 17°F | 71°F 1963 | -14°F 1974 | 10% | 6% |
| Mar 24 | 40°F | 17°F | 71°F 1993 | -10°F 1955 | 10% | 6% |
| Mar 25 | 41°F | 18°F | 78°F 2007 | -17°F 1964 | 10% | 6% |
| Mar 26 | 41°F | 18°F | 67°F 1973 | -15°F 1964 | 10% | 6% |
| Mar 27 | 42°F | 19°F | 70°F 1986 | -6°F 1964 | 10% | 6% |
| Mar 28 | 43°F | 19°F | 71°F 1986 | -6°F 1964 | 10% | 6% |
| Mar 29 | 43°F | 20°F | 70°F 1966 | -15°F 1964 | 10% | 6% |
| Mar 30 | 44°F | 20°F | 79°F 1966 | -7°F 2018 | 10% | 6% |
| Mar 31 | 45°F | 21°F | 70°F 2012 | -1°F 1975 | 10% | 6% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- March 1
- sunrise 7:23 AM, sunset 6:27 PM
- March 31
- sunrise 7:22 AM, sunset 8:12 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00328792 (Towner 2 Ne), public domain. Records: NOAA GHCN-Daily, station USW00024013, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.