Belle-Isle-en-Terre Weather in September
Average highs run from 20°C on September 1 to 18°C on September 30, and lows from 14°C to 13°C. Normal precipitation for the month is 53 mm over about 12 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
- 19°C
- Average low
- 13°C
- Precipitation
- 53 mm
- Record high
- 31°CSep 30, 2011
- Record low
- 7°CSep 28, 1974
- Daylight
- 13 h 25 min to 11 h 44 min
- Cloud cover
- 60%
- Humidity
- 81%
- Dew point
- 12°C
- Wind
- 17.3 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 | 20°C | 14°C | 27°C 1954 | 10°C 1986 | 32% |
| Sep 2 | 20°C | 14°C | 27°C 1961 | 10°C 1956 | 31% |
| Sep 3 | 20°C | 14°C | 26°C 2005 | 8°C 1950 | 30% |
| Sep 4 | 20°C | 14°C | 30°C 1949 | 9°C 1977 | 30% |
| Sep 5 | 20°C | 14°C | 29°C 1949 | 9°C 1992 | 30% |
| Sep 6 | 20°C | 14°C | 27°C 2025 | 9°C 1952 | 31% |
| Sep 7 | 20°C | 14°C | 28°C 2016 | 8°C 1956 | 32% |
| Sep 8 | 20°C | 14°C | 25°C 1999 | 9°C 1952 | 34% |
| Sep 9 | 20°C | 14°C | 27°C 1948 | 9°C 1963 | 34% |
| Sep 10 | 21°C | 14°C | 28°C 1999 | 8°C 1977 | 35% |
| Sep 11 | 20°C | 14°C | 27°C 1947 | 7°C 1972 | 35% |
| Sep 12 | 19°C | 14°C | 26°C 2016 | 9°C 1992 | 35% |
| Sep 13 | 19°C | 13°C | 23°C 2006 | 10°C 1995 | 34% |
| Sep 14 | 19°C | 13°C | 24°C 1947 | 9°C 1954 | 34% |
| Sep 15 | 19°C | 13°C | 26°C 2023 | 8°C 1950 | 35% |
| Sep 16 | 19°C | 13°C | 26°C 1997 | 9°C 1994 | 36% |
| Sep 17 | 19°C | 13°C | 30°C 2003 | 9°C 1970 | 37% |
| Sep 18 | 19°C | 13°C | 25°C 2018 | 9°C 1983 | 38% |
| Sep 19 | 19°C | 13°C | 27°C 1987 | 8°C 2010 | 39% |
| Sep 20 | 20°C | 14°C | 30°C 2003 | 9°C 2000 | 39% |
| Sep 21 | 20°C | 13°C | 27°C 2003 | 8°C 1950 | 39% |
| Sep 22 | 19°C | 13°C | 23°C 1956 | 9°C 1951 | 40% |
| Sep 23 | 19°C | 13°C | 27°C 1983 | 8°C 1954 | 40% |
| Sep 24 | 19°C | 13°C | 30°C 1983 | 9°C 1973 | 43% |
| Sep 25 | 18°C | 12°C | 24°C 1949 | 8°C 1990 | 44% |
| Sep 26 | 18°C | 13°C | 24°C 1948 | 7°C 1965 | 44% |
| Sep 27 | 18°C | 13°C | 25°C 2011 | 8°C 1965 | 46% |
| Sep 28 | 19°C | 13°C | 29°C 2011 | 7°C 1974 | 47% |
| Sep 29 | 18°C | 13°C | 24°C 2002 | 7°C 1974 | 49% |
| Sep 30 | 18°C | 13°C | 31°C 2011 | 7°C 1974 | 49% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+2).
- September 1
- sunrise 7:31 AM, sunset 8:56 PM
- September 30
- sunrise 8:11 AM, sunset 7:55 PM
Other months
Sources
Records: NOAA GHCN-Daily, station FRE00171627, 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.