Newton Mearns Weather in September
Average highs run from 18°C on September 1 to 15°C on September 30, and lows from 10°C to 9°C. Normal precipitation for the month is 82 mm over about 18 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
- 16°C
- Average low
- 9°C
- Precipitation
- 82 mm
- Record high
- 28°CSep 4, 2023
- Record low
- -1°CSep 28, 1974
- Daylight
- 13 h 49 min to 11 h 37 min
- Cloud cover
- 78%
- Humidity
- 89%
- Dew point
- 10°C
- Wind
- 18.0 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 | 18°C | 10°C | 25°C 1991 | 5°C 2002 | 60% |
| Sep 2 | 18°C | 11°C | 23°C 1996 | 3°C 1965 | 60% |
| Sep 3 | 18°C | 11°C | 24°C 1991 | 5°C 1976 | 59% |
| Sep 4 | 17°C | 11°C | 28°C 2023 | 5°C 2018 | 60% |
| Sep 5 | 17°C | 11°C | 26°C 2023 | 3°C 1993 | 59% |
| Sep 6 | 17°C | 10°C | 28°C 2023 | 3°C 2013 | 60% |
| Sep 7 | 17°C | 10°C | 28°C 2021 | 4°C 1983 | 61% |
| Sep 8 | 17°C | 10°C | 24°C 2023 | 1°C 1972 | 60% |
| Sep 9 | 17°C | 10°C | 25°C 2023 | 0°C 1972 | 59% |
| Sep 10 | 17°C | 10°C | 21°C 2002 | 2°C 1986 | 59% |
| Sep 11 | 16°C | 10°C | 21°C 2002 | 3°C 1986 | 59% |
| Sep 12 | 16°C | 10°C | 22°C 2002 | 1°C 1983 | 60% |
| Sep 13 | 16°C | 9°C | 21°C 2016 | 2°C 1986 | 59% |
| Sep 14 | 16°C | 9°C | 22°C 2016 | 0°C 1975 | 58% |
| Sep 15 | 16°C | 9°C | 22°C 1991 | 0°C 1986 | 58% |
| Sep 16 | 16°C | 9°C | 21°C 2003 | 1°C 1986 | 57% |
| Sep 17 | 16°C | 9°C | 22°C 2014 | 1°C 2022 | 57% |
| Sep 18 | 16°C | 9°C | 23°C 2024 | 2°C 1986 | 58% |
| Sep 19 | 16°C | 9°C | 23°C 1998 | 3°C 1986 | 57% |
| Sep 20 | 17°C | 9°C | 24°C 2019 | 2°C 1960 | 58% |
| Sep 21 | 16°C | 9°C | 21°C 2019 | 0°C 1964 | 57% |
| Sep 22 | 16°C | 9°C | 21°C 2000 | -1°C 1979 | 58% |
| Sep 23 | 15°C | 8°C | 21°C 1970 | 2°C 1990 | 60% |
| Sep 24 | 15°C | 9°C | 21°C 2021 | 1°C 1971 | 61% |
| Sep 25 | 16°C | 9°C | 20°C 2021 | 0°C 2010 | 62% |
| Sep 26 | 15°C | 8°C | 20°C 1985 | 0°C 2010 | 63% |
| Sep 27 | 16°C | 9°C | 22°C 2011 | -1°C 2020 | 65% |
| Sep 28 | 16°C | 9°C | 21°C 1985 | -1°C 1974 | 65% |
| Sep 29 | 16°C | 10°C | 23°C 2011 | 0°C 1974 | 66% |
| Sep 30 | 15°C | 9°C | 20°C 1985 | 1°C 1974 | 67% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+1).
- September 1
- sunrise 6:22 AM, sunset 8:11 PM
- September 30
- sunrise 7:18 AM, sunset 6:55 PM
Other months
Sources
Records: NOAA GHCN-Daily, station UKE00105856, 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.