March is one of the cooler months of the year in Katy, with average highs near 22.4°C and lows around 10.5°C (mean 16.5°C). It is one of the drier months, averaging 82 mm of rainfall and 79% relative humidity across the period.
March is one of the cooler months of the year in Katy. Across 45 years of records, the warmest March in Katy was 2020 — when the month averaged 20.9°C — while the coldest were 2001 and 2010 at 13.4°C. Typical March days reach 22.4°C with nights near 10.5°C. The long-term trend is warming, about 0.7°C per decade.
March is one of the drier months in Katy, averaging 82 mm of rainfall. The wettest March on record was 2001 with 187 mm, while the driest were 1996 and 2019 at 13 mm.
Relative humidity in Katy during March averages 79%. The most humid March was 1997 at 86%, and the least humid was 1996 at 68%.
March receives about 4.5 kWh/m²/day of solar energy in Katy. The sunniest March was 2013 at 5.4 kWh/m²/day, and the cloudiest were 1985 and 1995 at 3.7.
Average wind speed in Katy during March is 2.1 m/s. The windiest March was 2008 at 2.6 m/s, while the calmest were 2003 and 2015 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.4°C | 15.7°C | 16.6°C | 16.8°C | 18.3°C | +2.9°C |
| Avg High | 21.4°C | 21.4°C | 22.4°C | 22.7°C | 24.6°C | +3.2°C |
| Avg Low | 9.4°C | 10.0°C | 10.8°C | 10.8°C | 12.1°C | +2.7°C |
| Avg Rain | 77 mm | 99 mm | 84 mm | 84 mm | 57 mm | -21 mm |
March temperatures in Katy have risen by about 1.9°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -5.1°C (2014) to a record high of 32.3°C (2025).
Rainfall in March is one of the drier months, averaging 82 mm, with a wettest year of 187 mm.
A good time to visit Katy
March is a good time to visit Katy, with days averaging 22.4°C and nights around 10.5°C (mean 16.5°C, cooler than Katy's yearly average) and higher rainfall. October and April are marginally more temperate, but March still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 25.8°C | 19.0°C | 12.3°C | 32.3°C | 4.3°C | 52 mm | 73% | 2.2 m/s | 5.1 |
| 2024 | 23.8°C | 18.2°C | 12.7°C | 29.1°C | 5.8°C | 76 mm | 82% | 1.8 m/s | 4 |
| 2023 | 24.6°C | 18.8°C | 13.0°C | 29.1°C | 1.8°C | 37 mm | 76% | 2.3 m/s | 4.1 |
| 2022 | 23.0°C | 15.9°C | 8.8°C | 29.2°C | -1.9°C | 80 mm | 70% | 2.3 m/s | 5.3 |
| 2021 | 23.9°C | 17.2°C | 10.5°C | 30.0°C | 3.0°C | 36 mm | 76% | 2.2 m/s | 4.5 |
| 2020 🔥 | 26.7°C | 20.9°C | 15.2°C | 31.4°C | 6.2°C | 57 mm | 80% | 2.1 m/s | 3.9 |
| 2019 | 21.1°C | 15.5°C | 9.8°C | 27.3°C | -3.9°C | 13 mm | 79% | 2.1 m/s | 3.9 |
| 2018 | 24.1°C | 18.3°C | 12.5°C | 28.8°C | 4.9°C | 93 mm | 77% | 2.1 m/s | 4.8 |
| 2017 | 24.2°C | 18.9°C | 13.5°C | 29.1°C | 3.9°C | 100 mm | 81% | 2.2 m/s | 4.7 |
| 2016 | 24.1°C | 18.3°C | 12.5°C | 29.5°C | 1.8°C | 140 mm | 81% | 2.2 m/s | 4.6 |
| 2015 | 21.5°C | 16.1°C | 10.7°C | 26.7°C | -3.2°C | 177 mm | 85% | 1.7 m/s | 4 |
| 2014 | 19.7°C | 13.7°C | 7.7°C | 27.9°C | -5.1°C | 73 mm | 81% | 2.1 m/s | 4.2 |
| 2013 | 22.9°C | 15.7°C | 8.4°C | 32.0°C | 0.7°C | 29 mm | 69% | 2.2 m/s | 5.4 |
| 2012 | 24.2°C | 19.2°C | 14.1°C | 28.0°C | 5.6°C | 138 mm | 84% | 2 m/s | 4.2 |
| 2011 | 25.4°C | 18.5°C | 11.6°C | 32.0°C | 2.3°C | 29 mm | 73% | 2.1 m/s | 4.9 |
| 2010 | 19.8°C | 13.4°C | 7.0°C | 25.4°C | 0.0°C | 53 mm | 79% | 2 m/s | 5.2 |
| 2009 | 23.2°C | 17.0°C | 10.7°C | 29.5°C | -0.7°C | 101 mm | 76% | 2.2 m/s | 4.4 |
| 2008 | 22.3°C | 16.1°C | 9.9°C | 28.0°C | -1.1°C | 60 mm | 79% | 2.6 m/s | 4.6 |
| 2007 | 22.7°C | 17.7°C | 12.6°C | 27.0°C | -0.3°C | 152 mm | 83% | 2 m/s | 4.5 |
| 2006 | 24.7°C | 18.5°C | 12.4°C | 30.2°C | 0.5°C | 52 mm | 74% | 2.3 m/s | 4.4 |
| 2005 | 21.1°C | 15.2°C | 9.3°C | 27.8°C | 2.3°C | 76 mm | 83% | 1.9 m/s | 4.7 |
| 2004 | 23.4°C | 18.3°C | 13.3°C | 26.9°C | 5.6°C | 54 mm | 82% | 1.9 m/s | 4.3 |
| 2003 | 20.5°C | 14.9°C | 9.4°C | 25.2°C | 0.7°C | 49 mm | 85% | 1.7 m/s | 4.2 |
| 2002 | 21.6°C | 15.5°C | 9.4°C | 27.7°C | -4.3°C | 63 mm | 80% | 2.5 m/s | 4.3 |
| 2001 ❄️ 🌧️ | 19.0°C | 13.4°C | 7.7°C | 24.7°C | 3.9°C | 187 mm | 82% | 1.9 m/s | 4.3 |
| 2000 | 25.9°C | 19.7°C | 13.5°C | 31.5°C | 3.0°C | 46 mm | 75% | 2.2 m/s | 4.7 |
| 1999 | 22.6°C | 17.0°C | 11.3°C | 27.1°C | 0.1°C | 99 mm | 81% | 2.3 m/s | 4.2 |
| 1998 | 20.5°C | 14.6°C | 8.7°C | 27.1°C | -1.7°C | 52 mm | 79% | 2.5 m/s | 4.6 |
| 1997 | 22.6°C | 17.1°C | 11.6°C | 27.8°C | 5.1°C | 156 mm | 86% | 2 m/s | 3.9 |
| 1996 | 20.3°C | 13.6°C | 6.9°C | 30.1°C | -3.7°C | 13 mm | 68% | 2.4 m/s | 4.7 |
| 1995 | 21.1°C | 16.0°C | 11.0°C | 29.1°C | -1.0°C | 139 mm | 85% | 2 m/s | 3.7 |
| 1994 | 21.9°C | 15.8°C | 9.7°C | 27.7°C | -0.5°C | 66 mm | 80% | 2 m/s | 4.4 |
| 1993 | 20.3°C | 14.7°C | 9.2°C | 27.0°C | -3.3°C | 146 mm | 82% | 1.9 m/s | 4.4 |
| 1992 | 21.4°C | 16.0°C | 10.5°C | 26.1°C | 1.5°C | 136 mm | 84% | 2.1 m/s | 4.4 |
| 1991 | 21.7°C | 16.0°C | 10.2°C | 27.6°C | 4.1°C | 56 mm | 81% | 2.2 m/s | 4.5 |
| 1990 | 21.5°C | 16.4°C | 11.3°C | 26.0°C | 2.3°C | 123 mm | 82% | 2.3 m/s | 4.2 |
| 1989 | 21.3°C | 15.2°C | 9.1°C | 28.9°C | -4.3°C | 95 mm | 80% | 2.3 m/s | 4.6 |
| 1988 | 21.0°C | 14.8°C | 8.5°C | 27.8°C | -1.6°C | 124 mm | 78% | 2.3 m/s | 4.1 |
| 1987 | 20.0°C | 13.5°C | 7.1°C | 25.3°C | -1.9°C | 31 mm | 77% | 1.8 m/s | 5 |
| 1986 | 22.3°C | 15.9°C | 9.4°C | 26.6°C | 0.4°C | 36 mm | 75% | 1.8 m/s | 5.2 |
| 1985 | 22.5°C | 17.3°C | 12.0°C | 26.8°C | 5.5°C | 113 mm | 85% | 2.2 m/s | 3.7 |
| 1984 | 21.6°C | 15.5°C | 9.4°C | 30.1°C | 0.0°C | 63 mm | 80% | 2.2 m/s | 4.4 |
| 1983 | 20.2°C | 14.0°C | 7.8°C | 25.1°C | 0.3°C | 118 mm | 81% | 2.2 m/s | — |
| 1982 | 22.8°C | 17.4°C | 11.9°C | 29.5°C | -1.6°C | 64 mm | 82% | 2.2 m/s | — |
| 1981 | 21.2°C | 15.2°C | 9.2°C | 30.0°C | 0.9°C | 54 mm | 75% | 2 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 22.4°C with lows near 10.5°C (mean 16.5°C), based on 45 years of NASA POWER data.
March averages 82 mm of rainfall in Katy, one of the drier months. The wettest on record was 187 mm in 2001.
The hottest March reached 32.3°C in 2025. The coldest dipped to -5.1°C in 2014.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 1.9°C. Daytime highs moved from 21.7°C to 24.2°C and overnight lows from 10.1°C to 11.5°C over the same span.
March is one of the cooler months of the year in Katy and one of the drier months, so plan for around 22.4°C daytime highs and 10.5°C at night.
Not quite — March is the 5th coolest month in Katy, averaging 16.5°C.
For March in Katy, pack light layers you can adjust through the day, with typical highs of 22.4°C and lows of 10.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 79% — quite humid.
Average wind speed in March is 2.1 m/s. The windiest March on record averaged 2.6 m/s (2008).
The wettest March on record was 2001 with 187 mm. On average, March sees 82 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 Katy behaves each March, 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 March specifically, along with year-by-year records and how the month has changed over the decades.
