Osny Weather in May
Average highs run from 17°C on May 1 to 22°C on May 31, and lows from 9°C to 12°C. Normal precipitation for the month is 63 mm over about 12 wet days.
May day by day
The normal high and low for each date, and the record, in °C.
- Normal low
- Normal high
- Record high
- Record low
May at a glance
- Average high
- 20°C
- Precipitation
- 63 mm
- Record high
- 35°CMay 24, 1922
- Record low
- 0°CMay 1, 1945
- Daylight
- 14 h 37 min to 15 h 54 min
- Cloud cover
- 69%
- Humidity
- 77%
- Dew point
- 9°C
- Wind
- 15.1 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| May 1 | 17°C | 9°C | 27°C 1950 | 0°C 1945 | 44% |
| May 2 | 18°C | 9°C | 27°C 1990 | 1°C 1909 | 44% |
| May 3 | 18°C | 28°C 1997 | 0°C 1945 | 43% | |
| May 4 | 18°C | 8°C | 29°C 1923 | 2°C 1941 | 42% |
| May 5 | 19°C | 29°C 1923 | 3°C 1910 | 41% | |
| May 6 | 20°C | 30°C 1976 | 1°C 2019 | 40% | |
| May 7 | 19°C | 10°C | 30°C 1976 | 1°C 1902 | 41% |
| May 8 | 20°C | 30°C 1976 | 1°C 1902 | 39% | |
| May 9 | 20°C | 10°C | 28°C 1976 | 2°C 1941 | 39% |
| May 10 | 21°C | 30°C 1945 | 3°C 1949 | 38% | |
| May 11 | 20°C | 30°C 1912 | 2°C 1902 | 39% | |
| May 12 | 19°C | 33°C 1912 | 2°C 1902 | 40% | |
| May 13 | 20°C | 32°C 1998 | 4°C 1935 | 40% | |
| May 14 | 19°C | 31°C 1943 | 3°C 1909 | 41% | |
| May 15 | 19°C | 10°C | 30°C 1992 | 2°C 1935 | 40% |
| May 16 | 20°C | 31°C 1945 | 3°C 1935 | 39% | |
| May 17 | 20°C | 32°C 1945 | 2°C 1944 | 38% | |
| May 18 | 20°C | 30°C 1942 | 0°C 1935 | 39% | |
| May 19 | 20°C | 10°C | 28°C 1932 | 2°C 1907 | 38% |
| May 20 | 20°C | 11°C | 30°C 1932 | 3°C 1900 | 38% |
| May 21 | 21°C | 11°C | 32°C 1922 | 4°C 1907 | 39% |
| May 22 | 21°C | 33°C 1922 | 4°C 1955 | 38% | |
| May 23 | 21°C | 34°C 1922 | 3°C 1905 | 38% | |
| May 24 | 22°C | 12°C | 35°C 1922 | 2°C 2013 | 38% |
| May 25 | 22°C | 12°C | 33°C 1953 | 6°C 2011 | 37% |
| May 26 | 23°C | 30°C 2005 | 5°C 1923 | 37% | |
| May 27 | 21°C | 12°C | 32°C 2005 | 4°C 2013 | 38% |
| May 28 | 22°C | 32°C 1944 | 5°C 1961 | 38% | |
| May 29 | 22°C | 35°C 1944 | 4°C 1961 | 39% | |
| May 30 | 22°C | 35°C 1944 | 6°C 1961 | 40% | |
| May 31 | 22°C | 12°C | 33°C 1947 | 6°C 1915 | 42% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+2).
- May 1
- sunrise 6:31 AM, sunset 9:08 PM
- May 31
- sunrise 5:53 AM, sunset 9:47 PM
Other months
Sources
Records: NOAA GHCN-Daily, station FRM00007150, 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.