January is one of the warmer months of the year in Seymour, with average highs near 30.1°C and lows around 13.6°C (mean 21.9°C). It is about average for rainfall, averaging 48 mm of rainfall and 53% relative humidity across the period.
January is one of the warmer months of the year in Seymour. Across 45 years of records, the warmest January in Seymour was 2019 — when the month averaged 25.3°C — while the coldest was 1992 at 17.9°C. Typical January days reach 30.1°C with nights near 13.6°C. The long-term trend is warming, about 0.4°C per decade.
January is about average for rainfall in Seymour, averaging 48 mm of rainfall. The wettest January on record was 2024 with 167 mm, while the driest was 2009 at 4 mm.
Relative humidity in Seymour during January averages 53%. The most humid January was 2024 at 70%, and the least humid was 2009 at 42%.
January receives about 7.1 kWh/m²/day of solar energy in Seymour. The sunniest January was 2009 at 8.1 kWh/m²/day, and the cloudiest were 1984 and 2016 at 6.4.
Average wind speed in Seymour during January is 3.2 m/s. The windiest Januarys were 1990 and 2013 at 3.7 m/s, while the calmest was 1993 at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 21.1°C | 21.3°C | 22.2°C | 22.6°C | 22.2°C | +1.1°C |
| Avg High | 29.7°C | 29.4°C | 30.6°C | 30.9°C | 30.0°C | +0.3°C |
| Avg Low | 12.6°C | 13.3°C | 13.6°C | 14.1°C | 14.4°C | +1.8°C |
| Avg Rain | 45 mm | 45 mm | 29 mm | 49 mm | 85 mm | +40 mm |
January temperatures in Seymour have risen by about 0.4°C between 1981–1985 and 2021–2025.
January has ranged from a record low of 4.8°C (1987) to a record high of 45.5°C (1982).
Rainfall in January is about average for rainfall, averaging 48 mm, with a wettest year of 167 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.3°C per decade while lows rose 0.5°C per decade, narrowing the gap between day and night.
One of the best times to visit Seymour
January is one of the best times to visit Seymour. Expect days averaging 30.1°C and nights around 13.6°C (mean 21.9°C) — warmer than Seymour's yearly average — with moderate rainfall (48 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 | 31.5°C | 23.1°C | 14.7°C | 40.6°C | 10.0°C | 21 mm | 48% | 3.3 m/s | 7.4 |
| 2024 🌧️ | 27.2°C | 20.6°C | 14.0°C | 32.2°C | 8.6°C | 167 mm | 70% | 2.8 m/s | 6.6 |
| 2023 | 28.9°C | 21.4°C | 13.9°C | 36.3°C | 9.2°C | 85 mm | 61% | 2.8 m/s | 7.1 |
| 2022 | 32.4°C | 24.6°C | 16.8°C | 38.3°C | 12.6°C | 72 mm | 56% | 2.8 m/s | 7.2 |
| 2021 | 29.4°C | 21.5°C | 13.7°C | 38.2°C | 8.5°C | 99 mm | 56% | 3.2 m/s | 6.9 |
| 2020 | 30.5°C | 21.9°C | 13.3°C | 43.0°C | 8.1°C | 66 mm | 54% | 3.1 m/s | 6.9 |
| 2019 🔥 | 35.0°C | 25.3°C | 15.6°C | 45.3°C | 9.4°C | 16 mm | 46% | 3.3 m/s | 7.8 |
| 2018 | 32.4°C | 23.7°C | 15.1°C | 42.0°C | 9.8°C | 49 mm | 51% | 3.2 m/s | 7.2 |
| 2017 | 30.7°C | 22.2°C | 13.6°C | 39.3°C | 9.4°C | 41 mm | 54% | 3 m/s | 7.4 |
| 2016 | 29.5°C | 22.2°C | 14.8°C | 42.9°C | 9.3°C | 88 mm | 57% | 2.9 m/s | 6.4 |
| 2015 | 29.5°C | 21.6°C | 13.6°C | 39.9°C | 8.4°C | 50 mm | 55% | 3.3 m/s | 6.7 |
| 2014 | 32.2°C | 23.4°C | 14.5°C | 43.5°C | 8.9°C | 16 mm | 45% | 3.5 m/s | 7.5 |
| 2013 | 31.9°C | 22.6°C | 13.2°C | 41.1°C | 8.8°C | 4 mm | 43% | 3.7 m/s | 7.7 |
| 2012 | 30.2°C | 22.3°C | 14.3°C | 39.2°C | 7.8°C | 40 mm | 51% | 3.5 m/s | 7.2 |
| 2011 | 26.8°C | 20.4°C | 13.9°C | 36.1°C | 7.9°C | 148 mm | 70% | 2.8 m/s | 6.8 |
| 2010 | 31.2°C | 22.0°C | 12.8°C | 42.5°C | 7.4°C | 38 mm | 50% | 3.5 m/s | 7.5 |
| 2009 | 32.8°C | 23.0°C | 13.2°C | 44.4°C | 5.6°C | 4 mm | 42% | 3.1 m/s | 8.1 |
| 2008 | 31.1°C | 22.6°C | 14.2°C | 39.5°C | 10.3°C | 64 mm | 55% | 3.2 m/s | 7.4 |
| 2007 | 30.6°C | 22.8°C | 14.9°C | 40.6°C | 8.2°C | 30 mm | 51% | 3.3 m/s | 6.8 |
| 2006 | 32.3°C | 23.7°C | 15.1°C | 41.7°C | 9.8°C | 47 mm | 52% | 3.5 m/s | 7.2 |
| 2005 | 29.5°C | 21.5°C | 13.4°C | 37.1°C | 6.3°C | 27 mm | 54% | 2.9 m/s | 6.8 |
| 2004 | 28.7°C | 20.1°C | 11.5°C | 37.7°C | 6.8°C | 21 mm | 51% | 3.3 m/s | 7.2 |
| 2003 | 31.2°C | 22.1°C | 12.9°C | 42.8°C | 8.1°C | 7 mm | 46% | 3.4 m/s | 7.4 |
| 2002 | 29.5°C | 21.0°C | 12.5°C | 39.1°C | 7.7°C | 27 mm | 51% | 3.4 m/s | 6.6 |
| 2001 | 33.3°C | 24.7°C | 16.0°C | 42.1°C | 11.1°C | 36 mm | 48% | 3.1 m/s | 6.8 |
| 2000 | 27.4°C | 20.0°C | 12.6°C | 35.5°C | 6.7°C | 26 mm | 56% | 3.1 m/s | 6.5 |
| 1999 | 33.1°C | 24.3°C | 15.6°C | 42.2°C | 11.8°C | 32 mm | 53% | 3.1 m/s | 7.3 |
| 1998 | 30.6°C | 22.5°C | 14.4°C | 40.0°C | 9.8°C | 30 mm | 51% | 3.2 m/s | 7 |
| 1997 | 30.6°C | 22.1°C | 13.7°C | 39.9°C | 7.7°C | 41 mm | 49% | 3.3 m/s | 7.5 |
| 1996 | 28.3°C | 20.4°C | 12.4°C | 37.6°C | 7.5°C | 52 mm | 57% | 3 m/s | 6.9 |
| 1995 | 30.1°C | 22.5°C | 15.0°C | 38.1°C | 7.5°C | 78 mm | 55% | 3 m/s | 6.6 |
| 1994 | 27.3°C | 18.9°C | 10.5°C | 40.2°C | 5.0°C | 33 mm | 58% | 3.1 m/s | 7.2 |
| 1993 | 27.4°C | 20.3°C | 13.2°C | 37.0°C | 7.3°C | 84 mm | 68% | 2.6 m/s | 6.8 |
| 1992 ❄️ | 25.3°C | 17.9°C | 10.5°C | 38.1°C | 5.8°C | 14 mm | 61% | 3.4 m/s | 7 |
| 1991 | 30.3°C | 22.2°C | 14.1°C | 40.4°C | 9.2°C | 81 mm | 54% | 3.3 m/s | 7.1 |
| 1990 | 30.6°C | 22.0°C | 13.4°C | 41.5°C | 7.2°C | 8 mm | 47% | 3.7 m/s | 7 |
| 1989 | 27.6°C | 19.9°C | 12.2°C | 36.5°C | 7.8°C | 41 mm | 56% | 2.9 m/s | 7.1 |
| 1988 | 31.8°C | 23.1°C | 14.4°C | 40.7°C | 6.9°C | 67 mm | 50% | 3 m/s | 7.4 |
| 1987 | 28.1°C | 19.5°C | 10.8°C | 37.8°C | 4.8°C | 38 mm | 51% | 2.7 m/s | 7.1 |
| 1986 | 26.8°C | 18.7°C | 10.6°C | 35.4°C | 7.2°C | 23 mm | 56% | 3.3 m/s | 7.2 |
| 1985 | 29.9°C | 20.9°C | 11.9°C | 42.4°C | 7.4°C | 21 mm | 46% | 3.5 m/s | 7.3 |
| 1984 | 26.9°C | 19.4°C | 11.9°C | 33.4°C | 6.4°C | 103 mm | 59% | 3.2 m/s | 6.4 |
| 1983 | 29.2°C | 20.0°C | 10.8°C | 41.0°C | 5.6°C | 20 mm | 44% | 3.3 m/s | — |
| 1982 | 32.4°C | 23.6°C | 14.7°C | 45.5°C | 8.8°C | 49 mm | 45% | 3.2 m/s | — |
| 1981 | 34.7°C | 25.2°C | 15.8°C | 42.4°C | 10.3°C | 48 mm | 46% | 3.3 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 30.1°C with lows near 13.6°C (mean 21.9°C), based on 45 years of NASA POWER data.
January averages 48 mm of rainfall in Seymour, about average for rainfall. The wettest on record was 167 mm in 2024.
The hottest January reached 45.5°C in 1982. The coldest dipped to 4.8°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 0.4°C — but days and nights have moved in opposite directions. Overnight lows rose from 13°C to 14.6°C while daytime highs eased from 30.6°C to 29.9°C, narrowing the gap between day and night.
January is one of the warmer months of the year in Seymour and about average for rainfall, so plan for around 30.1°C daytime highs and 13.6°C at night.
Not quite — January is the 12th coolest month in Seymour, averaging 21.9°C.
For January in Seymour, pack light, breathable clothing and sun protection, with typical highs of 30.1°C and lows of 13.6°C.
Relative humidity in January averages 53% — relatively dry.
Average wind speed in January is 3.2 m/s. The windiest January on record averaged 3.7 m/s (1990).
The wettest January on record was 2024 with 167 mm. On average, January sees 48 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 Seymour behaves each January, 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 January specifically, along with year-by-year records and how the month has changed over the decades.
