September is one of the warmer months of the year in Cold Lake, with average highs near 16.6°C and lows around 5.4°C (mean 11°C). It is about average for rainfall, averaging 40 mm of rainfall and 70% relative humidity across the period.
September is one of the warmer months of the year in Cold Lake. Across 45 years of records, the warmest September in Cold Lake was 2009 — when the month averaged 15.5°C — while the coldest was 2018 at 4.5°C. Typical September days reach 16.6°C with nights near 5.4°C. The long-term trend is warming, about 0.6°C per decade.
September is about average for rainfall in Cold Lake, averaging 40 mm of rainfall. The wettest September on record was 2018 with 80 mm, while the driest was 2013 at 4 mm.
Relative humidity in Cold Lake during September averages 70%. The most humid Septembers were 2004 and 2018 at 79%, and the least humid was 1998 at 61%.
September receives about 3.3 kWh/m²/day of solar energy in Cold Lake. The sunniest September was 2011 at 4.1 kWh/m²/day, and the cloudiest were 1996 and 2018 at 2.6.
Average wind speed in Cold Lake during September is 1.6 m/s. The windiest Septembers were 1996, 1997 and 2009, among others at 1.8 m/s, while the calmest were 2023 and 2025 at 1.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.8°C | 11.0°C | 11.0°C | 10.8°C | 13.3°C | +3.5°C |
| Avg High | 15.3°C | 16.8°C | 16.4°C | 16.3°C | 18.9°C | +3.6°C |
| Avg Low | 4.2°C | 5.2°C | 5.5°C | 5.3°C | 7.7°C | +3.5°C |
| Avg Rain | 41 mm | 31 mm | 44 mm | 42 mm | 44 mm | +4 mm |
September temperatures in Cold Lake have risen by about 4.6°C between 1981–1985 and 2021–2025.
September has ranged from a record low of -5.7°C (2018) to a record high of 31.5°C (2022).
Rainfall in September is about average for rainfall, averaging 40 mm, with a wettest year of 80 mm.
One of the best times to visit Cold Lake
September is one of the best times to visit Cold Lake. Expect days averaging 16.6°C and nights around 5.4°C (mean 11°C) — warmer than Cold Lake's yearly average — with moderate rainfall (40 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 | 21.1°C | 15.1°C | 9.1°C | 26.5°C | 3.7°C | 46 mm | 67% | 1.4 m/s | 3.7 |
| 2024 | 19.8°C | 14.4°C | 9.0°C | 31.2°C | 3.6°C | 73 mm | 69% | 1.5 m/s | 3.5 |
| 2023 | 19.3°C | 13.7°C | 8.0°C | 23.6°C | 2.6°C | 21 mm | 69% | 1.4 m/s | 3.4 |
| 2022 | 20.1°C | 14.1°C | 8.1°C | 31.5°C | 1.6°C | 35 mm | 67% | 1.6 m/s | 3.5 |
| 2021 | 17.9°C | 12.4°C | 6.8°C | 24.2°C | -0.4°C | 56 mm | 71% | 1.6 m/s | 3.4 |
| 2020 | 15.4°C | 10.3°C | 5.2°C | 22.9°C | -1.8°C | 35 mm | 77% | 1.7 m/s | 3 |
| 2019 | 15.3°C | 10.7°C | 6.0°C | 22.4°C | -4.0°C | 48 mm | 79% | 1.5 m/s | 3 |
| 2018 ❄️ 🌧️ | 8.8°C | 4.5°C | 0.2°C | 20.0°C | -5.7°C | 80 mm | 79% | 1.5 m/s | 2.6 |
| 2017 | 17.2°C | 11.5°C | 5.7°C | 27.3°C | 0.5°C | 38 mm | 72% | 1.5 m/s | 3.4 |
| 2016 | 16.3°C | 10.9°C | 5.6°C | 26.4°C | 0.4°C | 38 mm | 74% | 1.5 m/s | 3 |
| 2015 | 15.0°C | 9.8°C | 4.6°C | 24.3°C | -3.4°C | 57 mm | 75% | 1.6 m/s | 3.2 |
| 2014 | 16.5°C | 10.6°C | 4.8°C | 26.2°C | -3.0°C | 26 mm | 71% | 1.5 m/s | 3.2 |
| 2013 | 21.0°C | 14.5°C | 8.0°C | 28.8°C | 1.0°C | 4 mm | 62% | 1.6 m/s | 4 |
| 2012 | 18.6°C | 12.7°C | 6.7°C | 24.1°C | 3.7°C | 30 mm | 69% | 1.7 m/s | 3.7 |
| 2011 | 20.1°C | 13.6°C | 7.0°C | 29.5°C | -1.8°C | 32 mm | 64% | 1.6 m/s | 4.1 |
| 2010 | 13.7°C | 8.8°C | 4.0°C | 22.7°C | -3.7°C | 66 mm | 78% | 1.6 m/s | 3 |
| 2009 🔥 | 21.7°C | 15.5°C | 9.2°C | 30.4°C | 2.8°C | 22 mm | 66% | 1.8 m/s | 3.7 |
| 2008 | 17.0°C | 11.4°C | 5.7°C | 23.8°C | 1.2°C | 19 mm | 67% | 1.6 m/s | 3.4 |
| 2007 | 15.5°C | 10.0°C | 4.5°C | 23.6°C | -1.6°C | 47 mm | 72% | 1.5 m/s | 3.5 |
| 2006 | 16.7°C | 11.4°C | 6.0°C | 28.3°C | -0.2°C | 61 mm | 72% | 1.6 m/s | 3.3 |
| 2005 | 14.7°C | 9.8°C | 4.9°C | 21.3°C | -1.2°C | 45 mm | 75% | 1.6 m/s | 3.2 |
| 2004 | 14.0°C | 9.2°C | 4.5°C | 21.2°C | -4.2°C | 79 mm | 79% | 1.6 m/s | 3 |
| 2003 | 14.9°C | 9.8°C | 4.7°C | 26.8°C | -2.7°C | 68 mm | 73% | 1.7 m/s | 3.2 |
| 2002 | 15.7°C | 10.2°C | 4.6°C | 24.2°C | -4.9°C | 21 mm | 66% | 1.7 m/s | 3.5 |
| 2001 | 19.2°C | 12.8°C | 6.3°C | 27.7°C | 2.7°C | 21 mm | 65% | 1.6 m/s | 3.4 |
| 2000 | 14.5°C | 9.4°C | 4.3°C | 22.1°C | -4.7°C | 59 mm | 78% | 1.7 m/s | 3 |
| 1999 | 16.5°C | 10.4°C | 4.4°C | 25.0°C | -5.6°C | 15 mm | 64% | 1.6 m/s | 3.8 |
| 1998 | 18.3°C | 12.1°C | 5.9°C | 29.0°C | -1.6°C | 21 mm | 61% | 1.5 m/s | 3.4 |
| 1997 | 17.4°C | 12.0°C | 6.6°C | 26.1°C | -1.4°C | 52 mm | 74% | 1.8 m/s | 3.2 |
| 1996 | 13.9°C | 9.3°C | 4.7°C | 23.6°C | -5.5°C | 69 mm | 73% | 1.8 m/s | 2.6 |
| 1995 | 17.9°C | 11.9°C | 5.8°C | 25.3°C | -4.8°C | 7 mm | 67% | 1.5 m/s | 4 |
| 1994 | 20.0°C | 13.6°C | 7.3°C | 27.8°C | 1.0°C | 28 mm | 61% | 1.6 m/s | 3.7 |
| 1993 | 15.3°C | 9.7°C | 4.1°C | 23.0°C | -2.5°C | 31 mm | 69% | 1.7 m/s | 3.5 |
| 1992 | 13.0°C | 7.6°C | 2.2°C | 23.7°C | -3.6°C | 50 mm | 71% | 1.7 m/s | 2.9 |
| 1991 | 16.7°C | 10.7°C | 4.7°C | 23.5°C | -3.2°C | 15 mm | 65% | 1.7 m/s | 3.4 |
| 1990 | 19.0°C | 12.6°C | 6.3°C | 25.0°C | 2.0°C | 18 mm | 64% | 1.7 m/s | 3.8 |
| 1989 | 15.4°C | 9.9°C | 4.3°C | 22.8°C | -3.9°C | 55 mm | 76% | 1.6 m/s | 3.3 |
| 1988 | 15.5°C | 10.0°C | 4.4°C | 27.4°C | -2.3°C | 32 mm | 72% | 1.6 m/s | 3.3 |
| 1987 | 18.1°C | 12.3°C | 6.4°C | 24.8°C | 2.6°C | 47 mm | 74% | 1.6 m/s | 3.6 |
| 1986 | 14.3°C | 9.0°C | 3.7°C | 19.6°C | -1.4°C | 29 mm | 70% | 1.6 m/s | 3.1 |
| 1985 | 12.0°C | 6.6°C | 1.2°C | 20.6°C | -5.1°C | 33 mm | 71% | 1.8 m/s | 3.1 |
| 1984 | 12.7°C | 7.8°C | 2.9°C | 24.0°C | -4.2°C | 74 mm | 73% | 1.5 m/s | 2.8 |
| 1983 | 13.8°C | 8.8°C | 3.9°C | 27.1°C | -5.3°C | 71 mm | 71% | 1.7 m/s | — |
| 1982 | 17.0°C | 10.9°C | 4.9°C | 24.1°C | -3.7°C | 14 mm | 69% | 1.7 m/s | — |
| 1981 | 19.0°C | 12.5°C | 6.0°C | 30.1°C | -1.5°C | 13 mm | 62% | 1.6 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 16.6°C with lows near 5.4°C (mean 11°C), based on 45 years of NASA POWER data.
September averages 40 mm of rainfall in Cold Lake, about average for rainfall. The wettest on record was 80 mm in 2018.
The hottest September reached 31.5°C in 2022. The coldest dipped to -5.7°C in 2018.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 4.6°C. Daytime highs moved from 14.9°C to 19.6°C and overnight lows from 3.8°C to 8.2°C over the same span.
September is one of the warmer months of the year in Cold Lake and about average for rainfall, so plan for around 16.6°C daytime highs and 5.4°C at night.
Not quite — September is the 9th coolest month in Cold Lake, averaging 11°C.
For September in Cold Lake, pack warm layers and a jacket for chilly mornings, with typical highs of 16.6°C and lows of 5.4°C.
Relative humidity in September averages 70% — moderately humid.
Average wind speed in September is 1.6 m/s. The windiest September on record averaged 1.8 m/s (1985).
The wettest September on record was 2018 with 80 mm. On average, September sees 40 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 Cold Lake 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.
