January is one of the cooler months of the year in Brownsville, with average highs near 22.4°C and lows around 12.5°C (mean 17.5°C). It is one of the drier months, averaging 29 mm of rainfall and 75% relative humidity across the period.
January is one of the cooler months of the year in Brownsville. Across 45 years of records, the warmest January in Brownsville was 1989 — when the month averaged 20.7°C — while the coldest was 2015 at 13.9°C. Typical January days reach 22.4°C with nights near 12.5°C. The long-term January temperature trend is broadly flat.
January is one of the drier months in Brownsville, averaging 29 mm of rainfall. The wettest January on record was 1984 with 124 mm, while the driest was 1982 at 1 mm.
Relative humidity in Brownsville during January averages 75%. The most humid January was 2015 at 82%, and the least humid was 1982 at 69%.
January receives about 3.1 kWh/m²/day of solar energy in Brownsville. The sunniest January was 1999 at 4 kWh/m²/day, and the cloudiest was 1984 at 2.2.
Average wind speed in Brownsville during January is 3.7 m/s. The windiest Januarys were 1982 and 1999 at 4.4 m/s, while the calmest was 1983 at 2.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.7°C | 17.9°C | 18.2°C | 16.6°C | 17.9°C | +1.2°C |
| Avg High | 21.6°C | 22.8°C | 22.9°C | 21.7°C | 23.2°C | +1.6°C |
| Avg Low | 11.9°C | 13.1°C | 13.6°C | 11.5°C | 12.6°C | +0.7°C |
| Avg Rain | 50 mm | 22 mm | 22 mm | 30 mm | 23 mm | -27 mm |
January temperatures in Brownsville have risen by about 1.3°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -2.9°C (2025) to a record high of 33.2°C (2017).
Rainfall in January is one of the drier months, averaging 29 mm, with a wettest year of 124 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows fell 0.1°C per decade, widening the gap between day and night.
A good time to visit Brownsville
January is a good time to visit Brownsville, with days averaging 22.4°C and nights around 12.5°C (mean 17.5°C, cooler than Brownsville's yearly average) and low rainfall. March 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 | 20.8°C | 15.8°C | 10.8°C | 31.4°C | -2.9°C | 26 mm | 75% | 3.8 m/s | 2.8 |
| 2024 | 22.1°C | 16.7°C | 11.3°C | 30.3°C | -1.0°C | 26 mm | 75% | 3.2 m/s | 3.1 |
| 2023 | 25.9°C | 20.5°C | 15.1°C | 30.6°C | 8.0°C | 3 mm | 75% | 3.7 m/s | 3.6 |
| 2022 | 21.4°C | 16.1°C | 10.8°C | 33.2°C | 1.4°C | 52 mm | 77% | 3.5 m/s | 3.2 |
| 2021 | 23.9°C | 18.1°C | 12.3°C | 32.1°C | 3.1°C | 16 mm | 71% | 3.4 m/s | 3.3 |
| 2020 | 24.9°C | 20.0°C | 15.2°C | 29.6°C | 8.6°C | 13 mm | 74% | 3.7 m/s | 3.2 |
| 2019 | 22.3°C | 17.5°C | 12.6°C | 27.9°C | 5.4°C | 32 mm | 75% | 3.7 m/s | 3.3 |
| 2018 | 19.6°C | 14.5°C | 9.4°C | 27.8°C | 0.7°C | 14 mm | 72% | 3.6 m/s | 3.2 |
| 2017 | 25.1°C | 19.7°C | 14.3°C | 33.2°C | 0.1°C | 16 mm | 71% | 4 m/s | 3.4 |
| 2016 | 21.5°C | 16.2°C | 10.8°C | 29.5°C | 4.7°C | 30 mm | 74% | 3.6 m/s | 3.4 |
| 2015 ❄️ | 18.9°C | 13.9°C | 9.0°C | 26.9°C | 3.3°C | 54 mm | 82% | 3.3 m/s | 2.9 |
| 2014 | 20.0°C | 14.6°C | 9.2°C | 26.4°C | 1.1°C | 21 mm | 78% | 3.6 m/s | 3.5 |
| 2013 | 21.9°C | 17.4°C | 12.8°C | 30.1°C | 3.9°C | 49 mm | 74% | 4.1 m/s | 3.1 |
| 2012 | 24.6°C | 19.3°C | 14.0°C | 31.2°C | 6.2°C | 12 mm | 73% | 3.8 m/s | 3.3 |
| 2011 | 22.7°C | 17.6°C | 12.4°C | 28.8°C | 4.7°C | 54 mm | 73% | 3.4 m/s | 3 |
| 2010 | 19.9°C | 15.1°C | 10.4°C | 27.0°C | -1.5°C | 16 mm | 75% | 3.8 m/s | 3.2 |
| 2009 | 24.2°C | 19.0°C | 13.9°C | 29.1°C | 8.5°C | 2 mm | 69% | 3.5 m/s | 3.6 |
| 2008 | 22.0°C | 17.6°C | 13.1°C | 31.4°C | 6.1°C | 34 mm | 74% | 4 m/s | 3 |
| 2007 | 19.8°C | 15.5°C | 11.3°C | 27.3°C | 2.5°C | 51 mm | 81% | 3.9 m/s | 2.4 |
| 2006 | 24.9°C | 19.8°C | 14.7°C | 30.9°C | 7.4°C | 6 mm | 69% | 3.9 m/s | 3.6 |
| 2005 | 24.4°C | 19.9°C | 15.5°C | 28.3°C | 9.8°C | 21 mm | 77% | 3.7 m/s | 3.4 |
| 2004 | 22.0°C | 18.1°C | 14.2°C | 27.6°C | 6.0°C | 44 mm | 79% | 3.7 m/s | 2.8 |
| 2003 | 20.9°C | 16.4°C | 11.8°C | 26.8°C | 6.3°C | 21 mm | 79% | 3.3 m/s | 3 |
| 2002 | 24.1°C | 18.7°C | 13.3°C | 32.3°C | 1.6°C | 3 mm | 72% | 4.3 m/s | 3.6 |
| 2001 | 21.6°C | 16.8°C | 12.1°C | 29.1°C | 1.5°C | 12 mm | 75% | 3.9 m/s | 2.9 |
| 2000 | 24.8°C | 20.2°C | 15.6°C | 30.5°C | 7.9°C | 21 mm | 74% | 3.9 m/s | 3.4 |
| 1999 | 24.2°C | 19.2°C | 14.2°C | 31.3°C | 7.0°C | 3 mm | 71% | 4.4 m/s | 4 |
| 1998 | 24.5°C | 19.5°C | 14.5°C | 28.9°C | 6.3°C | 16 mm | 77% | 3.7 m/s | 3.6 |
| 1997 | 21.6°C | 16.6°C | 11.6°C | 31.8°C | 2.2°C | 15 mm | 76% | 3.9 m/s | 2.8 |
| 1996 | 22.2°C | 16.5°C | 10.7°C | 28.9°C | 1.0°C | 10 mm | 72% | 4.2 m/s | 3.8 |
| 1995 | 22.9°C | 18.3°C | 13.7°C | 30.3°C | 7.7°C | 13 mm | 71% | 3.8 m/s | 3.2 |
| 1994 | 22.6°C | 18.2°C | 13.9°C | 28.0°C | 5.8°C | 43 mm | 75% | 3.8 m/s | 3.1 |
| 1993 | 22.6°C | 18.1°C | 13.6°C | 28.8°C | 5.7°C | 21 mm | 78% | 3.1 m/s | 2.3 |
| 1992 | 19.8°C | 15.7°C | 11.7°C | 26.4°C | 3.3°C | 73 mm | 81% | 3.2 m/s | 2.3 |
| 1991 | 22.8°C | 17.8°C | 12.8°C | 31.2°C | 7.3°C | 15 mm | 74% | 3.5 m/s | 2.5 |
| 1990 | 24.4°C | 19.5°C | 14.6°C | 29.6°C | 5.7°C | 12 mm | 74% | 3.8 m/s | 3.2 |
| 1989 🔥 | 25.2°C | 20.7°C | 16.2°C | 32.2°C | 6.1°C | 36 mm | 78% | 3.6 m/s | 2.8 |
| 1988 | 19.3°C | 14.9°C | 10.6°C | 25.4°C | 3.4°C | 80 mm | 74% | 3.6 m/s | 2.6 |
| 1987 | 21.1°C | 16.2°C | 11.3°C | 27.1°C | 3.7°C | 64 mm | 75% | 3.1 m/s | 3.2 |
| 1986 | 23.3°C | 17.8°C | 12.4°C | 27.9°C | 3.0°C | 18 mm | 71% | 3.3 m/s | 3.5 |
| 1985 | 19.7°C | 14.2°C | 8.8°C | 31.7°C | -2.1°C | 36 mm | 74% | 3.7 m/s | 2.7 |
| 1984 🌧️ | 19.5°C | 15.5°C | 11.5°C | 26.4°C | 2.7°C | 124 mm | 77% | 3.4 m/s | 2.2 |
| 1983 | 21.6°C | 16.8°C | 11.9°C | 29.8°C | 5.0°C | 22 mm | 74% | 2.9 m/s | — |
| 1982 | 23.8°C | 18.2°C | 12.6°C | 31.5°C | -0.1°C | 1 mm | 69% | 4.4 m/s | — |
| 1981 | 20.5°C | 16.0°C | 11.4°C | 25.9°C | 3.1°C | 69 mm | 78% | 3.1 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 22.4°C with lows near 12.5°C (mean 17.5°C), based on 45 years of NASA POWER data.
January averages 29 mm of rainfall in Brownsville, one of the drier months. The wettest on record was 124 mm in 1984.
The hottest January reached 33.2°C in 2017. The coldest dipped to -2.9°C in 2025.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 1.3°C. Daytime highs moved from 21°C to 22.8°C and overnight lows from 11.2°C to 12.1°C over the same span.
January is one of the cooler months of the year in Brownsville and one of the drier months, so plan for around 22.4°C daytime highs and 12.5°C at night.
Yes — January is the coldest month of the year in Brownsville, averaging 17.5°C.
For January in Brownsville, pack light layers you can adjust through the day, with typical highs of 22.4°C and lows of 12.5°C.
Relative humidity in January averages 75% — moderately humid.
Average wind speed in January is 3.7 m/s. The windiest January on record averaged 4.4 m/s (1982).
The wettest January on record was 1984 with 124 mm. On average, January sees 29 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 Brownsville 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.
