Fortezza Weather in September
Average highs run from 14°C on September 1 to 10°C on September 30, and lows from 4°C to 1°C. Normal precipitation for the month is 103 mm over about 16 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
- 12°C
- Average low
- 3°C
- Precipitation
- 103 mm
- Record high
- 29°CSep 11, 2023
- Record low
- -3°CSep 21, 1978
- Daylight
- 13 h 20 min to 11 h 45 min
- Cloud cover
- 65%
- Humidity
- 84%
- Dew point
- 4°C
- Wind
- 5.0 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 | 14°C | 4°C | 26°C 2024 | 1°C 2003 | 62% |
| Sep 2 | 14°C | 4°C | 27°C 2024 | 1°C 1980 | 61% |
| Sep 3 | 14°C | 4°C | 26°C 1984 | 1°C 1980 | 60% |
| Sep 4 | 14°C | 4°C | 26°C 2006 | 0°C 2003 | 61% |
| Sep 5 | 14°C | 4°C | 27°C 1982 | -1°C 1979 | 60% |
| Sep 6 | 13°C | 4°C | 25°C 2006 | 1°C 2000 | 59% |
| Sep 7 | 13°C | 3°C | 24°C 2013 | 0°C 1976 | 58% |
| Sep 8 | 13°C | 3°C | 23°C 1979 | -1°C 1983 | 57% |
| Sep 9 | 13°C | 3°C | 25°C 2023 | 4°C 2007 | 56% |
| Sep 10 | 13°C | 3°C | 25°C 2023 | 0°C 1985 | 56% |
| Sep 11 | 13°C | 3°C | 29°C 2023 | 2°C 1985 | 55% |
| Sep 12 | 13°C | 3°C | 27°C 2023 | 1°C 2007 | 54% |
| Sep 13 | 13°C | 3°C | 25°C 1987 | -1°C 1990 | 53% |
| Sep 14 | 13°C | 3°C | 26°C 1987 | 2°C 1988 | 52% |
| Sep 15 | 13°C | 3°C | 27°C 1987 | 1°C 2003 | 50% |
| Sep 16 | 12°C | 3°C | 26°C 1987 | -2°C 2002 | 50% |
| Sep 17 | 12°C | 3°C | 24°C 1978 | -1°C 1988 | 51% |
| Sep 18 | 12°C | 2°C | 27°C 1975 | 0°C 1982 | 52% |
| Sep 19 | 12°C | 2°C | 25°C 1987 | 0°C 2007 | 51% |
| Sep 20 | 12°C | 2°C | 23°C 2003 | -2°C 2022 | 50% |
| Sep 21 | 12°C | 2°C | 23°C 2003 | -3°C 1978 | 50% |
| Sep 22 | 11°C | 2°C | 23°C 1985 | -1°C 2008 | 49% |
| Sep 23 | 11°C | 2°C | 23°C 1985 | -1°C 1977 | 49% |
| Sep 24 | 11°C | 2°C | 24°C 1983 | -1°C 1977 | 49% |
| Sep 25 | 11°C | 2°C | 22°C 1985 | -1°C 2018 | 48% |
| Sep 26 | 11°C | 2°C | 21°C 1985 | -2°C 2002 | 49% |
| Sep 27 | 11°C | 1°C | 21°C 1985 | -2°C 2020 | 49% |
| Sep 28 | 11°C | 1°C | 22°C 1985 | 0°C 1990 | 49% |
| Sep 29 | 10°C | 1°C | 22°C 2015 | 0°C 2024 | 51% |
| Sep 30 | 10°C | 1°C | 22°C 2009 | -1°C 1989 | 53% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+2).
- September 1
- sunrise 6:33 AM, sunset 7:53 PM
- September 30
- sunrise 7:11 AM, sunset 6:56 PM
Other months
Sources
Records: NOAA GHCN-Daily, station ITM00016033, 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 2026-09-27. Sun and moon: computed with the NOAA solar equations and Meeus.