Markham Weather in May
Average highs run from 80°F on May 1 to 87°F on May 31, and lows from 62°F to 70°F. Normal precipitation for the month is 4.44 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
- 84°F
- Average low
- 66°F
- Precipitation
- 4.44 in
- Record high
- 98°FMay 1, 1953
- Record low
- 39°FMay 4, 2013
- Chance of a freeze
- 0%
- Days of 90°F or more
- 3.0
- Daylight
- 13 h 17 min to 13 h 52 min
- Cloud cover
- 56%
- Humidity
- 76%
- Dew point
- 68°F
- Wind
- 10.1 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 | 80°F | 62°F | 98°F 1953 | 49°F 2017 | 18% | 0% |
| May 2 | 80°F | 63°F | 92°F 1953 | 43°F 2005 | 18% | 0% |
| May 3 | 81°F | 63°F | 97°F 1964 | 45°F 2013 | 18% | 0% |
| May 4 | 81°F | 63°F | 97°F 1984 | 39°F 2013 | 18% | 0% |
| May 5 | 81°F | 63°F | 91°F 1951 | 46°F 2005 | 19% | 0% |
| May 6 | 81°F | 64°F | 91°F 2015 | 46°F 2005 | 19% | 0% |
| May 7 | 82°F | 64°F | 91°F 2015 | 50°F 1917 | 19% | 0% |
| May 8 | 82°F | 64°F | 92°F 2015 | 47°F 1917 | 19% | 0% |
| May 9 | 82°F | 64°F | 93°F 1998 | 47°F 1984 | 19% | 0% |
| May 10 | 82°F | 65°F | 95°F 1998 | 51°F 1961 | 19% | 0% |
| May 11 | 82°F | 65°F | 96°F 2015 | 55°F 1943 | 20% | 0% |
| May 12 | 83°F | 65°F | 94°F 1958 | 49°F 1960 | 20% | 0% |
| May 13 | 83°F | 65°F | 93°F 1964 | 52°F 1960 | 20% | 0% |
| May 14 | 83°F | 66°F | 92°F 1959 | 47°F 2014 | 20% | 0% |
| May 15 | 83°F | 66°F | 91°F 1959 | 47°F 2014 | 20% | 0% |
| May 16 | 84°F | 66°F | 92°F 1950 | 52°F 1945 | 20% | 0% |
| May 17 | 84°F | 66°F | 93°F 1950 | 47°F 1945 | 20% | 0% |
| May 18 | 84°F | 67°F | 95°F 2015 | 52°F 1945 | 20% | 0% |
| May 19 | 84°F | 67°F | 94°F 2015 | 54°F 2009 | 21% | 0% |
| May 20 | 84°F | 67°F | 95°F 2015 | 56°F 1981 | 21% | 0% |
| May 21 | 85°F | 67°F | 92°F 1954 | 59°F 1947 | 21% | 0% |
| May 22 | 85°F | 68°F | 92°F 2005 | 59°F 1967 | 21% | 0% |
| May 23 | 85°F | 68°F | 93°F 2015 | 56°F 1967 | 21% | 0% |
| May 24 | 85°F | 68°F | 94°F 1961 | 56°F 2017 | 22% | 0% |
| May 25 | 86°F | 68°F | 92°F 1966 | 60°F 1967 | 22% | 0% |
| May 26 | 86°F | 69°F | 95°F 1958 | 59°F 2022 | 22% | 0% |
| May 27 | 86°F | 69°F | 95°F 1958 | 57°F 1961 | 22% | 0% |
| May 28 | 86°F | 69°F | 94°F 1958 | 56°F 1961 | 23% | 0% |
| May 29 | 86°F | 69°F | 96°F 1955 | 60°F 1992 | 23% | 0% |
| May 30 | 87°F | 69°F | 96°F 1998 | 56°F 1984 | 23% | 0% |
| May 31 | 87°F | 70°F | 96°F 1998 | 55°F 1984 | 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 6:43 AM, sunset 8:00 PM
- May 31
- sunrise 6:26 AM, sunset 8:18 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00410569 (Bay City Wtr Wks), public domain. Records: NOAA GHCN-Daily, station USC00410569, 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.