September is one of the warmer months of the year in Labrador City, with average highs near 10.3°C and lows around 2.5°C (mean 6.4°C). It is a relatively wet time of year, averaging 121 mm of rainfall and 89% relative humidity across the period.
September is one of the warmer months of the year in Labrador City. Across 45 years of records, the warmest Septembers in Labrador City were 2003, 2023 and 2024 — when the month averaged 9.7°C — while the coldest was 1986 at 3.3°C. Typical September days reach 10.3°C with nights near 2.5°C. The long-term trend is warming, about 0.4°C per decade.
September is a relatively wet time of year in Labrador City, averaging 121 mm of rainfall. The wettest September on record was 2025 with 395 mm, while the driest was 2008 at 50 mm.
Relative humidity in Labrador City during September averages 89%. The most humid September was 2025 at 91%, and the least humid was 2006 at 87%.
September receives about 2.8 kWh/m²/day of solar energy in Labrador City. The sunniest Septembers were 1996, 2006 and 2010 at 3.3 kWh/m²/day, and the cloudiest was 2007 at 2.2.
Average wind speed in Labrador City during September is 3.7 m/s. The windiest September was 2020 at 4.6 m/s, while the calmest were 1981, 1996 and 2023 at 2.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 5.8°C | 5.9°C | 6.8°C | 6.2°C | 8.1°C | +2.3°C |
| Avg High | 9.6°C | 9.7°C | 10.8°C | 10.2°C | 11.9°C | +2.3°C |
| Avg Low | 1.9°C | 2.1°C | 2.7°C | 2.2°C | 4.3°C | +2.4°C |
| Avg Rain | 118 mm | 113 mm | 106 mm | 106 mm | 186 mm | +68 mm |
September temperatures in Labrador City have risen by about 2.2°C between 1981–1985 and 2021–2025.
September has ranged from a record low of -7.1°C (1989) to a record high of 25.1°C (2023).
Rainfall in September is a relatively wet time of year, averaging 121 mm, with a wettest year of 395 mm.
One of the best times to visit Labrador City
September is one of the best times to visit Labrador City. Expect days averaging 10.3°C and nights around 2.5°C (mean 6.4°C) — warmer than Labrador City's yearly average — with higher rainfall (121 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 🌧️ | 11.1°C | 7.7°C | 4.3°C | 21.7°C | -0.7°C | 395 mm | 91% | 3.7 m/s | 2.9 |
| 2024 | 13.9°C | 9.7°C | 5.5°C | 20.3°C | -2.8°C | 273 mm | 89% | 3 m/s | 3.2 |
| 2023 | 13.7°C | 9.7°C | 5.6°C | 25.1°C | 0.4°C | 88 mm | 90% | 2.9 m/s | 2.9 |
| 2022 | 11.5°C | 7.6°C | 3.8°C | 22.4°C | -1.5°C | 102 mm | 89% | 3.5 m/s | 2.7 |
| 2021 | 11.2°C | 7.4°C | 3.6°C | 17.8°C | -2.0°C | 117 mm | 90% | 3.7 m/s | 2.7 |
| 2020 | 10.2°C | 6.4°C | 2.7°C | 18.6°C | -3.7°C | 142 mm | 89% | 4.6 m/s | 2.7 |
| 2019 | 9.6°C | 5.5°C | 1.4°C | 18.6°C | -3.5°C | 72 mm | 89% | 3.5 m/s | 3 |
| 2018 | 9.1°C | 5.3°C | 1.6°C | 21.4°C | -5.2°C | 81 mm | 89% | 4.5 m/s | 3.1 |
| 2017 | 10.0°C | 6.1°C | 2.2°C | 17.8°C | -4.6°C | 101 mm | 91% | 3.2 m/s | 2.9 |
| 2016 | 9.8°C | 6.0°C | 2.3°C | 19.9°C | -3.2°C | 107 mm | 91% | 3.4 m/s | 2.7 |
| 2015 | 11.7°C | 7.4°C | 3.0°C | 18.9°C | -2.9°C | 72 mm | 89% | 3.8 m/s | 2.8 |
| 2014 | 8.4°C | 4.3°C | 0.3°C | 18.6°C | -4.6°C | 178 mm | 90% | 4 m/s | 2.5 |
| 2013 | 9.1°C | 4.7°C | 0.3°C | 17.0°C | -4.8°C | 98 mm | 89% | 3.7 m/s | 2.6 |
| 2012 | 12.7°C | 8.5°C | 4.4°C | 18.9°C | 0.2°C | 126 mm | 89% | 3.7 m/s | 3 |
| 2011 | 10.7°C | 6.8°C | 3.0°C | 18.1°C | -1.6°C | 117 mm | 90% | 4 m/s | 3.1 |
| 2010 | 10.6°C | 6.9°C | 3.2°C | 22.8°C | -3.4°C | 112 mm | 89% | 3.5 m/s | 3.3 |
| 2009 | 10.1°C | 6.1°C | 2.1°C | 19.6°C | -5.1°C | 71 mm | 90% | 3.8 m/s | 3.1 |
| 2008 | 10.9°C | 7.0°C | 3.1°C | 24.4°C | -3.7°C | 50 mm | 88% | 3.8 m/s | 2.8 |
| 2007 | 8.5°C | 5.0°C | 1.5°C | 18.4°C | -3.4°C | 181 mm | 91% | 4.1 m/s | 2.2 |
| 2006 | 10.8°C | 6.4°C | 2.1°C | 19.6°C | -2.2°C | 56 mm | 87% | 3.5 m/s | 3.3 |
| 2005 | 11.5°C | 7.5°C | 3.6°C | 21.0°C | -3.9°C | 149 mm | 89% | 4.1 m/s | 2.7 |
| 2004 | 10.7°C | 6.1°C | 1.4°C | 19.2°C | -2.0°C | 69 mm | 89% | 3.8 m/s | 2.8 |
| 2003 🔥 | 13.9°C | 9.7°C | 5.6°C | 22.7°C | -1.7°C | 125 mm | 89% | 3.6 m/s | 3.1 |
| 2002 | 11.4°C | 7.2°C | 3.0°C | 21.1°C | -3.4°C | 121 mm | 89% | 3.6 m/s | 2.9 |
| 2001 | 10.9°C | 6.8°C | 2.7°C | 23.2°C | -2.6°C | 110 mm | 90% | 3.5 m/s | 2.7 |
| 2000 | 9.3°C | 5.7°C | 2.0°C | 19.7°C | -5.9°C | 131 mm | 89% | 4.2 m/s | 2.6 |
| 1999 | 13.1°C | 8.9°C | 4.7°C | 23.0°C | -2.5°C | 150 mm | 91% | 3.2 m/s | 2.4 |
| 1998 | 9.5°C | 6.5°C | 3.5°C | 14.9°C | -1.7°C | 107 mm | 91% | 3.7 m/s | 2.8 |
| 1997 | 9.9°C | 6.6°C | 3.2°C | 18.0°C | -3.8°C | 122 mm | 91% | 3.1 m/s | 2.8 |
| 1996 | 10.6°C | 6.2°C | 1.7°C | 20.2°C | -3.5°C | 57 mm | 87% | 2.9 m/s | 3.3 |
| 1995 | 8.4°C | 4.7°C | 1.1°C | 15.2°C | -4.5°C | 128 mm | 89% | 4.2 m/s | 2.3 |
| 1994 | 10.4°C | 6.7°C | 3.1°C | 18.3°C | -2.1°C | 83 mm | 90% | 3.4 m/s | 2.9 |
| 1993 | 7.9°C | 4.3°C | 0.6°C | 15.3°C | -5.4°C | 101 mm | 88% | 4.2 m/s | 2.8 |
| 1992 | 10.5°C | 6.2°C | 1.9°C | 18.9°C | -3.3°C | 115 mm | 90% | 4.2 m/s | 2.7 |
| 1991 | 9.1°C | 5.1°C | 1.2°C | 17.4°C | -3.9°C | 67 mm | 88% | 3.7 m/s | 2.9 |
| 1990 | 7.9°C | 3.9°C | -0.1°C | 17.3°C | -4.8°C | 196 mm | 90% | 3.8 m/s | 2.5 |
| 1989 | 9.8°C | 5.6°C | 1.5°C | 19.9°C | -7.1°C | 134 mm | 89% | 4.3 m/s | 2.8 |
| 1988 | 8.6°C | 4.9°C | 1.1°C | 17.7°C | -4.4°C | 143 mm | 90% | 3.6 m/s | 2.7 |
| 1987 | 10.5°C | 6.8°C | 3.2°C | 17.0°C | -3.0°C | 86 mm | 90% | 3 m/s | 2.9 |
| 1986 ❄️ | 6.9°C | 3.3°C | -0.3°C | 16.6°C | -4.5°C | 132 mm | 89% | 3.8 m/s | 3.1 |
| 1985 | 10.6°C | 6.6°C | 2.6°C | 16.3°C | -3.2°C | 78 mm | 89% | 3.4 m/s | 3.1 |
| 1984 | 8.1°C | 4.6°C | 1.2°C | 20.0°C | -3.4°C | 144 mm | 89% | 4.2 m/s | 3 |
| 1983 | 10.5°C | 6.8°C | 3.0°C | 19.6°C | -1.9°C | 164 mm | 90% | 3.1 m/s | — |
| 1982 | 9.8°C | 5.2°C | 0.6°C | 22.0°C | -5.1°C | 83 mm | 88% | 3.5 m/s | — |
| 1981 | 11.8°C | 8.0°C | 4.3°C | 21.8°C | -3.3°C | 100 mm | 89% | 2.9 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 10.3°C with lows near 2.5°C (mean 6.4°C), based on 45 years of NASA POWER data.
September averages 121 mm of rainfall in Labrador City, a relatively wet time of year. The wettest on record was 395 mm in 2025.
The hottest September reached 25.1°C in 2023. The coldest dipped to -7.1°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 2.2°C. Daytime highs moved from 10.2°C to 12.3°C and overnight lows from 2.3°C to 4.6°C over the same span.
September is one of the warmer months of the year in Labrador City and a relatively wet time of year, so plan for around 10.3°C daytime highs and 2.5°C at night.
Not quite — September is the 9th coolest month in Labrador City, averaging 6.4°C.
For September in Labrador City, pack warm layers and a jacket for chilly mornings, with typical highs of 10.3°C and lows of 2.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 89% — quite humid.
Average wind speed in September is 3.7 m/s. The windiest September on record averaged 4.6 m/s (2020).
The wettest September on record was 2025 with 395 mm. On average, September sees 121 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 Labrador City 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.
