January is one of the cooler months of the year in Truro, with average highs near 9°C and lows around 6.4°C (mean 7.7°C). It is a relatively wet time of year, averaging 119 mm of rainfall and 86% relative humidity across the period.
January is one of the cooler months of the year in Truro. Across 45 years of records, the warmest January in Truro was 2007 — when the month averaged 9.3°C — while the coldest was 1987 at 4.1°C. Typical January days reach 9°C with nights near 6.4°C. The long-term trend is warming, about 0.2°C per decade.
January is a relatively wet time of year in Truro, averaging 119 mm of rainfall. The wettest January on record was 2016 with 215 mm, while the driest was 1997 at 26 mm.
Relative humidity in Truro during January averages 86%. The most humid Januarys were 1996 and 1997 at 91%, and the least humid was 1984 at 80%.
January receives about 0.8 kWh/m²/day of solar energy in Truro. The sunniest Januarys were 1992, 2003 and 2010, among others at 1 kWh/m²/day, and the cloudiest were 1995, 1996 and 2002, among others at 0.7.
Average wind speed in Truro during January is 7.1 m/s. The windiest January was 1984 at 9.3 m/s, while the calmest was 2022 at 5.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 7.2°C | 7.7°C | 8.0°C | 7.8°C | 8.0°C | +0.8°C |
| Avg High | 8.5°C | 9.1°C | 9.3°C | 9.0°C | 9.3°C | +0.8°C |
| Avg Low | 5.8°C | 6.3°C | 6.8°C | 6.5°C | 6.7°C | +0.9°C |
| Avg Rain | 118 mm | 128 mm | 102 mm | 127 mm | 119 mm | +1 mm |
January temperatures in Truro have risen by about 0.6°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -5.2°C (1987) to a record high of 12.9°C (2007).
Rainfall in January is a relatively wet time of year, averaging 119 mm, with a wettest year of 215 mm.
A quieter season to visit Truro
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Truro. That said, January — with days averaging 9°C and nights around 6.4°C (mean 7.7°C) and higher rainfall (119 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 9.4°C | 8.0°C | 6.6°C | 12.8°C | 4.1°C | 132 mm | 84% | 6.3 m/s | 0.9 |
| 2024 | 8.8°C | 7.6°C | 6.3°C | 12.8°C | 2.5°C | 91 mm | 84% | 6.9 m/s | 0.9 |
| 2023 | 9.4°C | 8.1°C | 6.8°C | 12.5°C | 3.5°C | 146 mm | 83% | 6.8 m/s | 0.9 |
| 2022 | 9.8°C | 8.5°C | 7.1°C | 12.7°C | 3.9°C | 62 mm | 84% | 5.2 m/s | 0.8 |
| 2021 | 8.2°C | 7.0°C | 5.8°C | 11.5°C | 2.4°C | 165 mm | 86% | 6.6 m/s | 0.8 |
| 2020 | 9.9°C | 8.6°C | 7.4°C | 12.8°C | 3.8°C | 119 mm | 86% | 6.6 m/s | 0.8 |
| 2019 | 9.0°C | 7.9°C | 6.8°C | 10.8°C | 3.7°C | 83 mm | 84% | 5.7 m/s | 0.8 |
| 2018 | 10.0°C | 8.6°C | 7.2°C | 12.9°C | 3.8°C | 163 mm | 86% | 8.4 m/s | 0.8 |
| 2017 | 9.2°C | 7.9°C | 6.6°C | 11.5°C | 3.8°C | 88 mm | 85% | 6.1 m/s | 0.8 |
| 2016 🌧️ | 10.1°C | 8.9°C | 7.7°C | 12.4°C | 4.7°C | 215 mm | 84% | 8.4 m/s | 0.8 |
| 2015 | 9.5°C | 8.1°C | 6.6°C | 12.3°C | 3.7°C | 160 mm | 82% | 8 m/s | 0.8 |
| 2014 | 9.8°C | 8.4°C | 7.1°C | 11.9°C | 4.3°C | 147 mm | 85% | 7.7 m/s | 0.8 |
| 2013 | 8.8°C | 7.6°C | 6.4°C | 11.9°C | 0.7°C | 122 mm | 87% | 6.5 m/s | 0.8 |
| 2012 | 9.7°C | 8.6°C | 7.5°C | 12.1°C | 3.6°C | 87 mm | 86% | 7.1 m/s | 0.8 |
| 2011 | 7.6°C | 6.3°C | 5.0°C | 11.0°C | 0.2°C | 112 mm | 87% | 5.9 m/s | 0.9 |
| 2010 | 6.5°C | 5.3°C | 4.0°C | 10.3°C | 0.9°C | 89 mm | 85% | 5.8 m/s | 1 |
| 2009 | 8.2°C | 7.0°C | 5.8°C | 10.9°C | 0.2°C | 142 mm | 85% | 6.9 m/s | 0.8 |
| 2008 | 10.3°C | 9.0°C | 7.8°C | 12.3°C | 5.4°C | 118 mm | 86% | 8.1 m/s | 0.8 |
| 2007 🔥 | 10.4°C | 9.3°C | 8.2°C | 12.9°C | 3.5°C | 97 mm | 84% | 8.4 m/s | 0.8 |
| 2006 | 8.3°C | 7.0°C | 5.8°C | 11.0°C | 1.9°C | 54 mm | 87% | 6.2 m/s | 0.9 |
| 2005 | 10.1°C | 8.8°C | 7.6°C | 12.7°C | 4.2°C | 72 mm | 85% | 8.3 m/s | 0.8 |
| 2004 | 9.8°C | 8.6°C | 7.4°C | 11.9°C | 3.0°C | 136 mm | 85% | 7.3 m/s | 0.8 |
| 2003 | 8.6°C | 7.4°C | 6.2°C | 12.5°C | 2.2°C | 103 mm | 84% | 7.8 m/s | 1 |
| 2002 | 10.1°C | 8.9°C | 7.6°C | 12.7°C | 4.0°C | 129 mm | 89% | 7.5 m/s | 0.7 |
| 2001 | 8.2°C | 7.0°C | 5.8°C | 12.2°C | 3.1°C | 120 mm | 86% | 6.7 m/s | 0.9 |
| 2000 | 8.6°C | 7.4°C | 6.1°C | 11.9°C | 3.3°C | 51 mm | 85% | 6.1 m/s | 0.9 |
| 1999 | 9.9°C | 8.6°C | 7.2°C | 12.2°C | 2.3°C | 138 mm | 85% | 7.4 m/s | 0.8 |
| 1998 | 9.7°C | 8.2°C | 6.7°C | 12.6°C | 1.8°C | 145 mm | 85% | 8.6 m/s | 0.8 |
| 1997 | 6.2°C | 4.9°C | 3.5°C | 9.9°C | -2.1°C | 26 mm | 91% | 5.8 m/s | 0.8 |
| 1996 | 9.2°C | 7.9°C | 6.5°C | 12.2°C | -0.8°C | 170 mm | 91% | 7.9 m/s | 0.7 |
| 1995 | 10.0°C | 8.4°C | 6.9°C | 12.0°C | 3.5°C | 175 mm | 85% | 8.4 m/s | 0.7 |
| 1994 | 9.2°C | 8.0°C | 6.8°C | 11.3°C | 3.8°C | 156 mm | 86% | 7.7 m/s | 0.9 |
| 1993 | 10.3°C | 8.8°C | 7.3°C | 12.0°C | 4.1°C | 141 mm | 87% | 7.6 m/s | 0.8 |
| 1992 | 7.8°C | 6.4°C | 5.0°C | 11.4°C | 2.0°C | 37 mm | 88% | 5.3 m/s | 1 |
| 1991 | 7.9°C | 6.5°C | 5.1°C | 12.1°C | 0.7°C | 123 mm | 83% | 6.9 m/s | 0.8 |
| 1990 | 10.5°C | 9.2°C | 8.0°C | 12.0°C | 5.8°C | 171 mm | 87% | 7.9 m/s | 0.8 |
| 1989 | 10.2°C | 8.8°C | 7.4°C | 12.3°C | 4.8°C | 64 mm | 84% | 5.9 m/s | 1 |
| 1988 | 9.8°C | 8.5°C | 7.2°C | 12.3°C | 5.5°C | 201 mm | 85% | 8 m/s | 0.9 |
| 1987 ❄️ | 5.5°C | 4.1°C | 2.7°C | 11.6°C | -5.2°C | 31 mm | 85% | 6.7 m/s | 0.7 |
| 1986 | 8.7°C | 7.4°C | 6.1°C | 11.7°C | 3.3°C | 136 mm | 83% | 8 m/s | 0.8 |
| 1985 | 6.1°C | 4.7°C | 3.2°C | 11.1°C | -1.4°C | 106 mm | 85% | 5.9 m/s | 0.9 |
| 1984 | 9.1°C | 7.5°C | 5.9°C | 12.3°C | 1.1°C | 190 mm | 80% | 9.3 m/s | 0.8 |
| 1983 | 9.8°C | 8.6°C | 7.4°C | 12.2°C | 4.4°C | 132 mm | 87% | 8.2 m/s | — |
| 1982 | 8.4°C | 7.1°C | 5.7°C | 11.5°C | 0.2°C | 146 mm | 91% | 6.8 m/s | — |
| 1981 | 9.3°C | 7.9°C | 6.5°C | 10.9°C | 2.7°C | 59 mm | 85% | 6.6 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 9°C with lows near 6.4°C (mean 7.7°C), based on 45 years of NASA POWER data.
January averages 119 mm of rainfall in Truro, a relatively wet time of year. The wettest on record was 215 mm in 2016.
The hottest January reached 12.9°C in 2007. The coldest dipped to -5.2°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 0.6°C. Daytime highs moved from 8.5°C to 9.1°C and overnight lows from 5.7°C to 6.5°C over the same span.
January is one of the cooler months of the year in Truro and a relatively wet time of year, so plan for around 9°C daytime highs and 6.4°C at night.
Not quite — January is the 2nd coolest month in Truro, averaging 7.7°C.
For January in Truro, pack warm layers and a jacket for chilly mornings, with typical highs of 9°C and lows of 6.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 86% — quite humid.
Average wind speed in January is 7.1 m/s. The windiest January on record averaged 9.3 m/s (1984).
The wettest January on record was 2016 with 215 mm. On average, January sees 119 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 Truro 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.
