January is one of the cooler months of the year in Saint Augustine, with average highs near 18°C and lows around 12.3°C (mean 15.2°C). It is one of the drier months, averaging 85 mm of rainfall and 78% relative humidity across the period.
January is one of the cooler months of the year in Saint Augustine. Across 45 years of records, the warmest January in Saint Augustine was 1993 — when the month averaged 18.6°C — while the coldest was 2018 at 11.8°C. Typical January days reach 18°C with nights near 12.3°C. The long-term January temperature trend is broadly flat.
January is one of the drier months in Saint Augustine, averaging 85 mm of rainfall. The wettest January on record was 1991 with 205 mm, while the driest was 1981 at 9 mm.
Relative humidity in Saint Augustine during January averages 78%. The most humid January was 1991 at 84%, and the least humid was 1981 at 66%.
January receives about 3.2 kWh/m²/day of solar energy in Saint Augustine. The sunniest January was 2003 at 3.7 kWh/m²/day, and the cloudiest were 1988 and 1993 at 2.5.
Average wind speed in Saint Augustine during January is 2.9 m/s. The windiest January was 1987 at 3.5 m/s, while the calmest was 2023 at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.6°C | 16.2°C | 15.1°C | 14.6°C | 15.0°C | +0.4°C |
| Avg High | 17.5°C | 18.8°C | 18.1°C | 17.5°C | 18.1°C | +0.6°C |
| Avg Low | 11.8°C | 13.6°C | 12.2°C | 11.6°C | 11.9°C | +0.1°C |
| Avg Rain | 92 mm | 114 mm | 65 mm | 100 mm | 37 mm | -55 mm |
January temperatures in Saint Augustine have risen by about 0.8°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -4.6°C (1985) to a record high of 26.3°C (2023).
Rainfall in January is one of the drier months, averaging 85 mm, with a wettest year of 205 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°C per decade while lows fell 0.2°C per decade, widening the gap between day and night.
A good time to visit Saint Augustine
January is a good time to visit Saint Augustine, with days averaging 18°C and nights around 12.3°C (mean 15.2°C, cooler than Saint Augustine's yearly average) and higher rainfall. April and November are marginally more temperate, but January still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 15.4°C | 12.1°C | 8.7°C | 22.7°C | 5.0°C | 55 mm | 72% | 2.9 m/s | 3.3 |
| 2024 | 17.7°C | 14.7°C | 11.7°C | 22.9°C | 4.1°C | 56 mm | 81% | 2.7 m/s | 3 |
| 2023 | 20.2°C | 16.8°C | 13.4°C | 26.3°C | 6.7°C | 35 mm | 76% | 2.3 m/s | 3.6 |
| 2022 | 17.6°C | 14.7°C | 11.9°C | 24.7°C | 4.8°C | 30 mm | 76% | 3 m/s | 3.3 |
| 2021 | 18.1°C | 14.9°C | 11.8°C | 23.6°C | 7.2°C | 16 mm | 78% | 2.5 m/s | 3.2 |
| 2020 | 19.3°C | 16.6°C | 13.9°C | 25.0°C | 5.0°C | 31 mm | 78% | 2.6 m/s | 3.2 |
| 2019 | 17.2°C | 14.4°C | 11.5°C | 24.2°C | 5.7°C | 108 mm | 79% | 2.8 m/s | 3.3 |
| 2018 ❄️ | 14.5°C | 11.8°C | 9.1°C | 20.6°C | 0.6°C | 114 mm | 80% | 2.8 m/s | 3.1 |
| 2017 | 20.5°C | 17.4°C | 14.2°C | 24.5°C | 5.9°C | 82 mm | 79% | 2.5 m/s | 3.4 |
| 2016 | 16.9°C | 14.2°C | 11.5°C | 23.8°C | 3.9°C | 164 mm | 79% | 2.9 m/s | 2.8 |
| 2015 | 17.9°C | 15.0°C | 12.1°C | 23.9°C | 4.9°C | 112 mm | 82% | 2.8 m/s | 3.2 |
| 2014 | 16.0°C | 13.0°C | 9.9°C | 22.4°C | 0.8°C | 111 mm | 81% | 3.1 m/s | 2.8 |
| 2013 | 20.7°C | 17.8°C | 15.0°C | 24.4°C | 8.8°C | 22 mm | 81% | 2.5 m/s | 3.2 |
| 2012 | 19.4°C | 15.9°C | 12.5°C | 23.9°C | 4.6°C | 25 mm | 75% | 2.6 m/s | 3.5 |
| 2011 | 16.7°C | 13.7°C | 10.6°C | 22.2°C | 4.2°C | 135 mm | 77% | 2.9 m/s | 3.3 |
| 2010 | 14.9°C | 12.3°C | 9.7°C | 22.1°C | 2.3°C | 124 mm | 78% | 3.3 m/s | 3.2 |
| 2009 | 17.7°C | 14.5°C | 11.3°C | 23.2°C | 1.7°C | 50 mm | 76% | 2.8 m/s | 3.3 |
| 2008 | 17.9°C | 15.2°C | 12.5°C | 23.8°C | 4.5°C | 97 mm | 80% | 2.9 m/s | 3 |
| 2007 | 19.0°C | 16.7°C | 14.4°C | 25.3°C | 5.0°C | 72 mm | 78% | 2.7 m/s | 3 |
| 2006 | 18.6°C | 15.8°C | 12.9°C | 22.8°C | 5.9°C | 64 mm | 80% | 2.6 m/s | 3.5 |
| 2005 | 18.8°C | 16.2°C | 13.6°C | 23.8°C | 4.2°C | 62 mm | 83% | 2.9 m/s | 3.1 |
| 2004 | 18.7°C | 15.6°C | 12.5°C | 24.5°C | 6.2°C | 65 mm | 74% | 3 m/s | 3.3 |
| 2003 | 15.2°C | 12.0°C | 8.9°C | 20.5°C | 0.4°C | 15 mm | 77% | 3.3 m/s | 3.7 |
| 2002 | 18.5°C | 15.6°C | 12.8°C | 24.3°C | 3.4°C | 84 mm | 81% | 2.6 m/s | 3.1 |
| 2001 | 17.1°C | 13.8°C | 10.6°C | 24.9°C | 4.1°C | 37 mm | 77% | 3 m/s | 3.4 |
| 2000 | 19.2°C | 16.0°C | 12.9°C | 25.4°C | 3.1°C | 102 mm | 77% | 3.2 m/s | 3.2 |
| 1999 | 20.0°C | 17.4°C | 14.7°C | 23.6°C | 3.4°C | 149 mm | 77% | 2.8 m/s | 3.4 |
| 1998 | 18.7°C | 16.3°C | 13.9°C | 23.4°C | 8.2°C | 139 mm | 83% | 3 m/s | 3.2 |
| 1997 | 19.2°C | 16.3°C | 13.4°C | 24.4°C | 3.2°C | 44 mm | 78% | 3 m/s | 3.2 |
| 1996 | 18.6°C | 15.2°C | 11.9°C | 24.0°C | 0.4°C | 40 mm | 76% | 3.3 m/s | 3.3 |
| 1995 | 17.7°C | 15.0°C | 12.3°C | 22.6°C | 6.5°C | 60 mm | 78% | 3.2 m/s | 3.1 |
| 1994 | 17.9°C | 15.5°C | 13.0°C | 22.8°C | 5.9°C | 204 mm | 81% | 3.3 m/s | 2.9 |
| 1993 🔥 | 20.6°C | 18.6°C | 16.6°C | 24.2°C | 9.1°C | 151 mm | 84% | 3 m/s | 2.5 |
| 1992 | 16.8°C | 14.3°C | 11.8°C | 21.6°C | 4.9°C | 116 mm | 78% | 2.8 m/s | 3 |
| 1991 🌧️ | 19.2°C | 16.8°C | 14.3°C | 23.6°C | 6.7°C | 205 mm | 84% | 2.9 m/s | 2.6 |
| 1990 | 19.6°C | 16.9°C | 14.1°C | 22.8°C | 7.3°C | 31 mm | 82% | 2.5 m/s | 3.5 |
| 1989 | 20.7°C | 18.0°C | 15.3°C | 23.7°C | 10.2°C | 62 mm | 82% | 2.7 m/s | 3.3 |
| 1988 | 16.9°C | 14.6°C | 12.3°C | 23.2°C | 5.4°C | 113 mm | 78% | 3.2 m/s | 2.5 |
| 1987 | 18.0°C | 14.9°C | 11.8°C | 24.1°C | 4.2°C | 102 mm | 81% | 3.5 m/s | 2.9 |
| 1986 | 17.7°C | 14.9°C | 12.1°C | 22.8°C | -2.1°C | 120 mm | 78% | 3.3 m/s | 3 |
| 1985 | 16.8°C | 13.1°C | 9.5°C | 24.1°C | -4.6°C | 48 mm | 72% | 3.4 m/s | 3.3 |
| 1984 | 17.4°C | 15.0°C | 12.6°C | 22.6°C | 7.3°C | 129 mm | 82% | 3.3 m/s | 2.9 |
| 1983 | 17.1°C | 14.5°C | 11.9°C | 22.6°C | 6.0°C | 163 mm | 79% | 3 m/s | — |
| 1982 | 17.3°C | 14.2°C | 11.2°C | 22.6°C | -0.8°C | 84 mm | 79% | 2.8 m/s | — |
| 1981 | 15.4°C | 12.2°C | 9.1°C | 20.2°C | 1.9°C | 9 mm | 66% | 3.2 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 18°C with lows near 12.3°C (mean 15.2°C), based on 45 years of NASA POWER data.
January averages 85 mm of rainfall in Saint Augustine, one of the drier months. The wettest on record was 205 mm in 1991.
The hottest January reached 26.3°C in 2023. The coldest dipped to -4.6°C in 1985.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 0.8°C. Daytime highs moved from 16.8°C to 17.8°C and overnight lows from 10.9°C to 11.5°C over the same span.
January is one of the cooler months of the year in Saint Augustine and one of the drier months, so plan for around 18°C daytime highs and 12.3°C at night.
Yes — January is the coldest month of the year in Saint Augustine, averaging 15.2°C.
For January in Saint Augustine, pack light layers you can adjust through the day, with typical highs of 18°C and lows of 12.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 78% — quite humid.
Average wind speed in January is 2.9 m/s. The windiest January on record averaged 3.5 m/s (1987).
The wettest January on record was 1991 with 205 mm. On average, January sees 85 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 Saint Augustine 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.
