September is one of the warmer months of the year in Iqaluit, with average highs near 2.8°C and lows around -2.7°C (mean 0°C). It is a relatively wet time of year, averaging 79 mm of rainfall and 92% relative humidity across the period.
September is one of the warmer months of the year in Iqaluit. Across 45 years of records, the warmest September in Iqaluit was 1998 — when the month averaged 2.7°C — while the coldest was 1982 at -2.7°C. Typical September days reach 2.8°C with nights near -2.7°C. The long-term September temperature trend is broadly flat.
September is a relatively wet time of year in Iqaluit, averaging 79 mm of rainfall. The wettest September on record was 2003 with 161 mm, while the driest was 1983 at 27 mm.
Relative humidity in Iqaluit during September averages 92%. The most humid September was 2013 at 94%, and the least humid was 1983 at 88%.
September receives about 2.1 kWh/m²/day of solar energy in Iqaluit. The sunniest Septembers were 1987 and 2015 at 2.5 kWh/m²/day, and the cloudiest was 2000 at 1.7.
Average wind speed in Iqaluit during September is 3.4 m/s. The windiest September was 2012 at 4.1 m/s, while the calmest was 1983 at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 0.0°C | -0.1°C | -0.1°C | 0.0°C | 0.6°C | +0.6°C |
| Avg High | 3.0°C | 2.7°C | 2.5°C | 2.6°C | 3.3°C | +0.3°C |
| Avg Low | -3.0°C | -2.9°C | -2.8°C | -2.6°C | -2.2°C | +0.8°C |
| Avg Rain | 68 mm | 74 mm | 97 mm | 85 mm | 65 mm | -3 mm |
September temperatures in Iqaluit have risen by about 0.9°C between 1981–1985 and 2021–2025.
September has ranged from a record low of -17.9°C (1989) to a record high of 13.1°C (2020).
Rainfall in September is a relatively wet time of year, averaging 79 mm, with a wettest year of 161 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
One of the best times to visit Iqaluit
September is one of the best times to visit Iqaluit. Expect days averaging 2.8°C and nights around -2.7°C (mean 0°C) — warmer than Iqaluit's yearly average — with moderate rainfall (79 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 | 3.2°C | 0.7°C | -1.8°C | 6.0°C | -3.7°C | 68 mm | 93% | 3 m/s | 2.3 |
| 2024 | 4.9°C | 2.1°C | -0.6°C | 10.1°C | -3.3°C | 73 mm | 93% | 3.3 m/s | 2.1 |
| 2023 | 2.5°C | 0.0°C | -2.5°C | 5.7°C | -5.9°C | 94 mm | 94% | 3.4 m/s | 1.9 |
| 2022 | 4.8°C | 2.3°C | -0.2°C | 9.7°C | -4.8°C | 62 mm | 93% | 3.5 m/s | 2.1 |
| 2021 | 1.9°C | -1.0°C | -3.9°C | 9.9°C | -10.3°C | 39 mm | 91% | 3 m/s | 2.4 |
| 2020 | 2.7°C | -0.7°C | -4.2°C | 13.1°C | -14.0°C | 57 mm | 90% | 3.3 m/s | 2.3 |
| 2019 | 4.1°C | 1.5°C | -1.1°C | 7.1°C | -3.7°C | 120 mm | 91% | 3.3 m/s | 2 |
| 2018 | 1.1°C | -1.8°C | -4.7°C | 9.5°C | -9.8°C | 73 mm | 93% | 3.3 m/s | 2.2 |
| 2017 | 2.0°C | -0.4°C | -2.8°C | 8.1°C | -7.2°C | 101 mm | 91% | 3.8 m/s | 2 |
| 2016 | 3.0°C | 0.4°C | -2.1°C | 10.3°C | -5.8°C | 59 mm | 92% | 3.8 m/s | 2.1 |
| 2015 | 3.2°C | 0.2°C | -2.7°C | 9.0°C | -9.7°C | 42 mm | 90% | 3.3 m/s | 2.5 |
| 2014 | 1.2°C | -1.2°C | -3.5°C | 8.9°C | -10.6°C | 60 mm | 92% | 3.3 m/s | 2 |
| 2013 | 0.5°C | -1.8°C | -4.1°C | 8.7°C | -10.2°C | 104 mm | 94% | 3.6 m/s | 1.8 |
| 2012 | 3.4°C | 1.0°C | -1.3°C | 7.3°C | -3.5°C | 117 mm | 93% | 4.1 m/s | 2 |
| 2011 | 1.9°C | -0.5°C | -2.8°C | 5.1°C | -8.3°C | 97 mm | 93% | 3.4 m/s | 2.1 |
| 2010 | 5.6°C | 2.6°C | -0.4°C | 12.7°C | -4.2°C | 75 mm | 91% | 3.2 m/s | 2.4 |
| 2009 | 1.6°C | -1.2°C | -4.1°C | 9.6°C | -14.0°C | 74 mm | 91% | 3.8 m/s | 2 |
| 2008 | 1.4°C | -1.0°C | -3.4°C | 9.3°C | -9.0°C | 103 mm | 93% | 3.5 m/s | 1.8 |
| 2007 | 1.8°C | -1.1°C | -4.1°C | 9.2°C | -10.2°C | 57 mm | 91% | 3.3 m/s | 2.2 |
| 2006 | 3.1°C | 0.7°C | -1.7°C | 10.7°C | -4.0°C | 114 mm | 93% | 3.2 m/s | 1.9 |
| 2005 | 2.9°C | -0.3°C | -3.4°C | 8.8°C | -10.0°C | 62 mm | 92% | 3 m/s | 2.2 |
| 2004 | 2.6°C | -0.3°C | -3.2°C | 12.1°C | -8.9°C | 99 mm | 93% | 3.4 m/s | 2.1 |
| 2003 🌧️ | 4.0°C | 1.5°C | -1.1°C | 11.0°C | -5.5°C | 161 mm | 93% | 3.7 m/s | 1.9 |
| 2002 | 2.1°C | -0.2°C | -2.5°C | 5.3°C | -6.4°C | 96 mm | 93% | 3.5 m/s | 1.8 |
| 2001 | 2.8°C | 0.3°C | -2.2°C | 7.5°C | -7.5°C | 83 mm | 92% | 2.7 m/s | 2.2 |
| 2000 | 3.1°C | 0.5°C | -2.1°C | 10.4°C | -9.1°C | 125 mm | 93% | 3.7 m/s | 1.7 |
| 1999 | 3.0°C | 0.2°C | -2.6°C | 5.8°C | -5.4°C | 52 mm | 91% | 3.1 m/s | 2.1 |
| 1998 🔥 | 5.8°C | 2.7°C | -0.4°C | 11.7°C | -3.7°C | 46 mm | 90% | 3.7 m/s | 2.3 |
| 1997 | 3.1°C | 0.1°C | -2.8°C | 11.7°C | -10.1°C | 49 mm | 90% | 3.1 m/s | 2.2 |
| 1996 | 3.3°C | 0.7°C | -2.0°C | 6.5°C | -3.9°C | 46 mm | 91% | 3.4 m/s | 2.2 |
| 1995 | 2.0°C | -0.8°C | -3.6°C | 8.9°C | -9.9°C | 109 mm | 93% | 2.9 m/s | 2 |
| 1994 | 2.9°C | 0.2°C | -2.6°C | 10.9°C | -9.1°C | 105 mm | 92% | 3.9 m/s | 1.9 |
| 1993 | 2.2°C | -0.4°C | -3.0°C | 5.4°C | -9.9°C | 74 mm | 92% | 3.5 m/s | 1.9 |
| 1992 | 1.1°C | -1.7°C | -4.5°C | 6.8°C | -10.2°C | 108 mm | 92% | 3.8 m/s | 1.9 |
| 1991 | 1.5°C | -1.2°C | -3.9°C | 7.6°C | -13.3°C | 94 mm | 92% | 3.3 m/s | 2.1 |
| 1990 | 1.8°C | -0.9°C | -3.6°C | 7.2°C | -8.2°C | 54 mm | 91% | 3.4 m/s | 2 |
| 1989 | 0.7°C | -2.6°C | -5.9°C | 6.8°C | -17.9°C | 56 mm | 91% | 3.2 m/s | 2.1 |
| 1988 | 3.9°C | 0.9°C | -2.2°C | 10.7°C | -7.7°C | 67 mm | 93% | 2.7 m/s | 1.8 |
| 1987 | 5.6°C | 2.3°C | -0.9°C | 12.8°C | -4.7°C | 62 mm | 91% | 2.8 m/s | 2.5 |
| 1986 | 2.3°C | -0.3°C | -2.8°C | 6.6°C | -6.9°C | 65 mm | 92% | 3.5 m/s | 2.3 |
| 1985 | 4.1°C | 1.4°C | -1.4°C | 10.0°C | -5.7°C | 74 mm | 92% | 3.8 m/s | 2.2 |
| 1984 | 1.1°C | -1.8°C | -4.6°C | 8.0°C | -10.6°C | 71 mm | 93% | 3.4 m/s | 1.9 |
| 1983 | 4.9°C | 1.0°C | -2.8°C | 11.3°C | -8.8°C | 27 mm | 88% | 2.6 m/s | — |
| 1982 ❄️ | 0.1°C | -2.7°C | -5.5°C | 8.4°C | -11.5°C | 74 mm | 92% | 3.5 m/s | — |
| 1981 | 4.7°C | 1.8°C | -1.0°C | 9.7°C | -3.8°C | 119 mm | 91% | 3.4 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 2.8°C with lows near -2.7°C (mean 0°C), based on 45 years of NASA POWER data.
September averages 79 mm of rainfall in Iqaluit, a relatively wet time of year. The wettest on record was 161 mm in 2003.
The hottest September reached 13.1°C in 2020. The coldest dipped to -17.9°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 0.9°C. Daytime highs moved from 3°C to 3.5°C and overnight lows from -3.1°C to -1.8°C over the same span.
September is one of the warmer months of the year in Iqaluit and a relatively wet time of year, so plan for around 2.8°C daytime highs and -2.7°C at night.
Not quite — September is the 9th coolest month in Iqaluit, averaging 0°C.
For September in Iqaluit, pack warm layers and a jacket for chilly mornings, with typical highs of 2.8°C and lows of -2.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 92% — quite humid.
Average wind speed in September is 3.4 m/s. The windiest September on record averaged 4.1 m/s (2012).
The wettest September on record was 2003 with 161 mm. On average, September sees 79 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 Iqaluit 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.
