Porto-Novo Weather in September
Average highs run from 27°C on September 1 to 28°C on September 30, and lows from 23°C to 24°C. Normal precipitation for the month is 174 mm over about 27 wet days.
September day by day
The normal high and low for each date, and the record, in °C.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 28°C
- Average low
- 24°C
- Precipitation
- 174 mm
- Record high
- 35°CSep 15, 2004
- Record low
- 20°CSep 23, 1955
- Daylight
- 12 h 14 min to 12 h 03 min
- Cloud cover
- 76%
- Humidity
- 88%
- Dew point
- 23°C
- Wind
- 13.0 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 |
|---|---|---|---|---|---|
| Sep 1 | 27°C | 23°C | 31°C 1973 | 22°C 1961 | 82% |
| Sep 2 | 27°C | 23°C | 31°C 1980 | 21°C 1976 | 83% |
| Sep 3 | 27°C | 23°C | 30°C 1941 | 21°C 1961 | 84% |
| Sep 4 | 27°C | 23°C | 31°C 1970 | 22°C 1973 | 85% |
| Sep 5 | 27°C | 23°C | 31°C 1941 | 21°C 1975 | 86% |
| Sep 6 | 28°C | 23°C | 33°C 1997 | 21°C 1991 | 86% |
| Sep 7 | 27°C | 23°C | 31°C 1941 | 21°C 1975 | 87% |
| Sep 8 | 28°C | 23°C | 30°C 1949 | 22°C 1975 | 87% |
| Sep 9 | 28°C | 23°C | 30°C 1949 | 21°C 1973 | 88% |
| Sep 10 | 28°C | 23°C | 31°C 1970 | 21°C 1957 | 88% |
| Sep 11 | 28°C | 23°C | 33°C 2001 | 21°C 1971 | 88% |
| Sep 12 | 28°C | 24°C | 31°C 1970 | 22°C 1979 | 89% |
| Sep 13 | 28°C | 24°C | 31°C 1984 | 21°C 1958 | 89% |
| Sep 14 | 28°C | 24°C | 32°C 1993 | 21°C 1975 | 89% |
| Sep 15 | 28°C | 24°C | 35°C 2004 | 22°C 1955 | 90% |
| Sep 16 | 28°C | 24°C | 31°C 1941 | 20°C 1962 | 90% |
| Sep 17 | 28°C | 24°C | 31°C 1947 | 21°C 1978 | 90% |
| Sep 18 | 28°C | 24°C | 31°C 1942 | 21°C 1961 | 90% |
| Sep 19 | 28°C | 24°C | 31°C 1948 | 21°C 1965 | 91% |
| Sep 20 | 28°C | 24°C | 31°C 1944 | 21°C 1968 | 91% |
| Sep 21 | 28°C | 24°C | 31°C 1944 | 20°C 1968 | 92% |
| Sep 22 | 28°C | 24°C | 32°C 1942 | 20°C 1955 | 92% |
| Sep 23 | 28°C | 24°C | 31°C 1945 | 20°C 1955 | 93% |
| Sep 24 | 28°C | 24°C | 32°C 1945 | 22°C 1961 | 93% |
| Sep 25 | 28°C | 24°C | 32°C 1944 | 21°C 1954 | 93% |
| Sep 26 | 28°C | 24°C | 32°C 1944 | 21°C 1954 | 94% |
| Sep 27 | 28°C | 24°C | 31°C 1944 | 21°C 1971 | 93% |
| Sep 28 | 28°C | 24°C | 32°C 1998 | 21°C 2008 | 94% |
| Sep 29 | 28°C | 24°C | 32°C 1941 | 21°C 1954 | 94% |
| Sep 30 | 28°C | 24°C | 32°C 1944 | 21°C 1947 | 93% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+1).
- September 1
- sunrise 6:43 AM, sunset 6:57 PM
- September 30
- sunrise 6:38 AM, sunset 6:41 PM
Other months
Sources
Records: NOAA GHCN-Daily, station BN000005344, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine, and temperature and precipitation: 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.