September is one of the warmer months of the year in Prince George, with average highs near 16.3°C and lows around 4.5°C (mean 10.4°C). It is about average for rainfall, averaging 66 mm of rainfall and 73% relative humidity across the period.
September is one of the warmer months of the year in Prince George. Across 45 years of records, the warmest September in Prince George was 2025 — when the month averaged 14°C — while the coldest was 1992 at 7.3°C. Typical September days reach 16.3°C with nights near 4.5°C. The long-term trend is warming, about 0.4°C per decade.
September is about average for rainfall in Prince George, averaging 66 mm of rainfall. The wettest September on record was 1992 with 151 mm, while the driest was 1990 at 13 mm.
Relative humidity in Prince George during September averages 73%. The most humid September was 2020 at 83%, and the least humid was 1990 at 62%.
September receives about 3.4 kWh/m²/day of solar energy in Prince George. The sunniest September was 1995 at 4.3 kWh/m²/day, and the cloudiest was 1992 at 2.7.
Average wind speed in Prince George during September is 0.1 m/s. The windiest September was 1995 at 0.3 m/s, while the calmest were 2021, 2023 and 2024, among others at 0.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.7°C | 10.8°C | 9.7°C | 10.4°C | 12.0°C | +2.3°C |
| Avg High | 15.7°C | 16.9°C | 15.4°C | 16.2°C | 17.8°C | +2.1°C |
| Avg Low | 3.7°C | 4.6°C | 4.1°C | 4.5°C | 6.3°C | +2.6°C |
| Avg Rain | 65 mm | 56 mm | 77 mm | 63 mm | 68 mm | +3 mm |
September temperatures in Prince George have risen by about 3.3°C between 1981–1985 and 2021–2025.
September has ranged from a record low of -6.5°C (2018) to a record high of 32.9°C (1988).
Rainfall in September is about average for rainfall, averaging 66 mm, with a wettest year of 151 mm.
One of the best times to visit Prince George
September is one of the best times to visit Prince George. Expect days averaging 16.3°C and nights around 4.5°C (mean 10.4°C) — warmer than Prince George's yearly average — with moderate rainfall (66 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 🔥 | 20.0°C | 14.0°C | 8.0°C | 30.5°C | 1.8°C | 60 mm | 69% | 0.2 m/s | 3.2 |
| 2024 | 17.5°C | 11.8°C | 6.2°C | 28.9°C | -0.6°C | 109 mm | 73% | 0.1 m/s | 3.5 |
| 2023 | 17.9°C | 11.7°C | 5.6°C | 27.1°C | 2.0°C | 24 mm | 67% | 0.1 m/s | 3.6 |
| 2022 | 20.0°C | 13.1°C | 6.2°C | 29.7°C | 2.2°C | 26 mm | 66% | 0.2 m/s | 3.9 |
| 2021 | 15.4°C | 10.4°C | 5.4°C | 23.1°C | 0.3°C | 106 mm | 76% | 0.1 m/s | 3.1 |
| 2020 | 16.2°C | 11.1°C | 6.1°C | 23.4°C | 1.3°C | 85 mm | 83% | 0.1 m/s | 3.3 |
| 2019 | 15.4°C | 10.4°C | 5.5°C | 26.3°C | -4.9°C | 62 mm | 77% | 0.1 m/s | 3 |
| 2018 | 13.7°C | 7.7°C | 1.6°C | 21.3°C | -6.5°C | 38 mm | 70% | 0.1 m/s | 3 |
| 2017 | 17.1°C | 11.5°C | 6.0°C | 29.4°C | -1.3°C | 73 mm | 74% | 0.2 m/s | 3.2 |
| 2016 | 14.0°C | 8.8°C | 3.6°C | 20.6°C | -1.3°C | 86 mm | 82% | 0.2 m/s | 3.2 |
| 2015 | 14.2°C | 8.8°C | 3.3°C | 24.0°C | -1.0°C | 70 mm | 77% | 0.1 m/s | 3.2 |
| 2014 | 18.1°C | 11.4°C | 4.7°C | 25.8°C | -5.6°C | 47 mm | 69% | 0.2 m/s | 3.6 |
| 2013 | 19.8°C | 13.4°C | 7.0°C | 29.8°C | -1.8°C | 40 mm | 68% | 0.1 m/s | 3.8 |
| 2012 | 18.9°C | 12.0°C | 5.0°C | 26.3°C | 0.6°C | 32 mm | 67% | 0.2 m/s | 3.9 |
| 2011 | 16.6°C | 11.0°C | 5.4°C | 26.4°C | 0.1°C | 85 mm | 75% | 0.1 m/s | 3.4 |
| 2010 | 14.3°C | 8.5°C | 2.7°C | 23.7°C | -3.7°C | 93 mm | 74% | 0.1 m/s | 3.1 |
| 2009 | 18.0°C | 12.3°C | 6.6°C | 28.1°C | -1.1°C | 77 mm | 73% | 0.1 m/s | 3.4 |
| 2008 | 16.1°C | 10.0°C | 3.9°C | 24.9°C | -0.7°C | 33 mm | 75% | 0.2 m/s | 3.6 |
| 2007 | 14.4°C | 8.9°C | 3.3°C | 22.3°C | -2.5°C | 80 mm | 77% | 0.1 m/s | 3.5 |
| 2006 | 18.0°C | 11.8°C | 5.6°C | 31.0°C | -2.5°C | 58 mm | 69% | 0.1 m/s | 3.5 |
| 2005 | 14.2°C | 8.8°C | 3.4°C | 19.2°C | -1.9°C | 67 mm | 76% | 0.1 m/s | 3.3 |
| 2004 | 13.4°C | 8.2°C | 3.1°C | 18.7°C | -2.5°C | 107 mm | 80% | 0.1 m/s | 2.9 |
| 2003 | 15.7°C | 9.8°C | 4.0°C | 27.1°C | -3.7°C | 89 mm | 73% | 0.2 m/s | 3.3 |
| 2002 | 14.0°C | 8.8°C | 3.6°C | 20.4°C | -0.8°C | 115 mm | 79% | 0.1 m/s | 2.9 |
| 2001 | 16.3°C | 10.2°C | 4.2°C | 23.5°C | -1.2°C | 59 mm | 74% | 0.1 m/s | 3.6 |
| 2000 | 13.7°C | 8.5°C | 3.2°C | 20.3°C | -4.2°C | 86 mm | 82% | 0.1 m/s | 3.3 |
| 1999 | 15.2°C | 9.4°C | 3.7°C | 23.0°C | -2.4°C | 69 mm | 75% | 0.2 m/s | 3.5 |
| 1998 | 17.3°C | 10.9°C | 4.6°C | 22.0°C | 0.9°C | 51 mm | 67% | 0.2 m/s | 3.5 |
| 1997 | 18.1°C | 11.5°C | 5.0°C | 25.0°C | -1.0°C | 52 mm | 73% | 0.1 m/s | 3.6 |
| 1996 | 13.9°C | 8.6°C | 3.3°C | 23.4°C | -3.8°C | 81 mm | 80% | 0.1 m/s | 3.1 |
| 1995 | 20.2°C | 13.2°C | 6.2°C | 27.5°C | -1.8°C | 15 mm | 62% | 0.3 m/s | 4.3 |
| 1994 | 17.9°C | 11.9°C | 6.0°C | 24.6°C | 0.4°C | 62 mm | 70% | 0.1 m/s | 3.1 |
| 1993 | 18.2°C | 11.3°C | 4.4°C | 26.6°C | -0.7°C | 29 mm | 64% | 0.2 m/s | 4.1 |
| 1992 ❄️ 🌧️ | 11.6°C | 7.3°C | 3.0°C | 18.5°C | -3.0°C | 151 mm | 77% | 0.1 m/s | 2.7 |
| 1991 | 17.2°C | 11.0°C | 4.8°C | 24.5°C | -0.8°C | 35 mm | 71% | 0.1 m/s | 3.9 |
| 1990 | 19.6°C | 12.5°C | 5.3°C | 25.6°C | 1.2°C | 13 mm | 62% | 0.2 m/s | 4.1 |
| 1989 | 18.7°C | 11.8°C | 5.0°C | 25.4°C | -1.3°C | 29 mm | 66% | 0.2 m/s | 4 |
| 1988 | 16.2°C | 10.0°C | 3.7°C | 32.9°C | -3.2°C | 61 mm | 68% | 0.1 m/s | 3.5 |
| 1987 | 19.0°C | 12.4°C | 5.8°C | 26.4°C | 1.4°C | 35 mm | 70% | 0.1 m/s | 3.4 |
| 1986 | 15.1°C | 8.8°C | 2.6°C | 21.4°C | -2.6°C | 83 mm | 70% | 0.1 m/s | 3.4 |
| 1985 | 13.4°C | 7.6°C | 1.9°C | 21.6°C | -4.5°C | 98 mm | 72% | 0.1 m/s | 3.5 |
| 1984 | 13.1°C | 7.5°C | 1.8°C | 21.4°C | -5.5°C | 68 mm | 74% | 0.1 m/s | 3.3 |
| 1983 | 12.8°C | 7.8°C | 2.7°C | 20.1°C | -5.2°C | 55 mm | 74% | 0.1 m/s | — |
| 1982 | 15.8°C | 10.5°C | 5.3°C | 22.7°C | -2.7°C | 107 mm | 82% | 0.2 m/s | — |
| 1981 | 17.6°C | 11.3°C | 4.9°C | 31.3°C | -3.5°C | 51 mm | 68% | 0.1 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 16.3°C with lows near 4.5°C (mean 10.4°C), based on 45 years of NASA POWER data.
September averages 66 mm of rainfall in Prince George, about average for rainfall. The wettest on record was 151 mm in 1992.
The hottest September reached 32.9°C in 1988. The coldest dipped to -6.5°C in 2018.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 3.3°C. Daytime highs moved from 14.5°C to 18.2°C and overnight lows from 3.3°C to 6.3°C over the same span.
September is one of the warmer months of the year in Prince George and about average for rainfall, so plan for around 16.3°C daytime highs and 4.5°C at night.
Not quite — September is the 9th coolest month in Prince George, averaging 10.4°C.
For September in Prince George, pack warm layers and a jacket for chilly mornings, with typical highs of 16.3°C and lows of 4.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 73% — moderately humid.
Average wind speed in September is 0.1 m/s. The windiest September on record averaged 0.3 m/s (1995).
The wettest September on record was 1992 with 151 mm. On average, September sees 66 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Prince George behaves each September, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for September specifically, along with year-by-year records and how the month has changed over the decades.
