March is one of the cooler months of the year in Keller, with average highs near 20.3°C and lows around 6.9°C (mean 13.6°C). It is about average for rainfall, averaging 74 mm of rainfall and 70% relative humidity across the period.
March is one of the cooler months of the year in Keller. Across 45 years of records, the warmest March in Keller was 2017 — when the month averaged 17.1°C — while the coldest was 2001 at 10.2°C. Typical March days reach 20.3°C with nights near 6.9°C. The long-term trend is warming, about 0.5°C per decade.
March is about average for rainfall in Keller, averaging 74 mm of rainfall. The wettest March on record was 2020 with 179 mm, while the driest was 2011 at 2 mm.
Relative humidity in Keller during March averages 70%. The most humid March was 2020 at 81%, and the least humid was 1996 at 51%.
March receives about 4.7 kWh/m²/day of solar energy in Keller. The sunniest March was 1986 at 5.4 kWh/m²/day, and the cloudiest was 1990 at 3.5.
Average wind speed in Keller during March is 3.5 m/s. The windiest March was 1996 at 4.3 m/s, while the calmest was 2015 at 2.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.1°C | 12.6°C | 13.8°C | 13.9°C | 15.3°C | +2.2°C |
| Avg High | 19.9°C | 19.2°C | 20.4°C | 20.6°C | 22.2°C | +2.3°C |
| Avg Low | 6.2°C | 6.0°C | 7.1°C | 7.2°C | 8.3°C | +2.1°C |
| Avg Rain | 69 mm | 79 mm | 90 mm | 55 mm | 76 mm | +7 mm |
March temperatures in Keller have risen by about 1.8°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -9.1°C (2014) to a record high of 33.5°C (2022).
Rainfall in March is about average for rainfall, averaging 74 mm, with a wettest year of 179 mm.
A good time to visit Keller
March is a good time to visit Keller, with days averaging 20.3°C and nights around 6.9°C (mean 13.6°C, cooler than Keller's yearly average) and moderate rainfall. May and October 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 | 24.7°C | 16.7°C | 8.8°C | 33.2°C | 2.3°C | 34 mm | 57% | 3.9 m/s | 5.3 |
| 2024 | 21.7°C | 15.3°C | 9.0°C | 27.7°C | 1.3°C | 91 mm | 76% | 3.3 m/s | 4.7 |
| 2023 | 21.2°C | 14.5°C | 7.9°C | 30.0°C | -2.8°C | 69 mm | 69% | 3.5 m/s | 4.4 |
| 2022 | 22.6°C | 14.2°C | 5.8°C | 33.5°C | -4.3°C | 33 mm | 53% | 3.7 m/s | 5.2 |
| 2021 | 21.9°C | 14.9°C | 7.8°C | 28.8°C | 2.0°C | 48 mm | 65% | 3.8 m/s | 5.1 |
| 2020 🌧️ | 21.2°C | 16.0°C | 10.7°C | 29.2°C | 2.1°C | 179 mm | 81% | 3.1 m/s | 3.8 |
| 2019 | 17.3°C | 11.6°C | 6.0°C | 27.0°C | -7.3°C | 43 mm | 70% | 3.3 m/s | 4.7 |
| 2018 | 20.9°C | 14.4°C | 8.0°C | 26.8°C | -0.7°C | 49 mm | 72% | 3.3 m/s | 5 |
| 2017 🔥 | 24.1°C | 17.1°C | 10.1°C | 31.8°C | 1.3°C | 28 mm | 67% | 3.7 m/s | 5 |
| 2016 | 20.7°C | 14.6°C | 8.4°C | 28.2°C | -0.5°C | 91 mm | 74% | 3.6 m/s | 5 |
| 2015 | 18.8°C | 12.9°C | 7.1°C | 28.7°C | -5.8°C | 61 mm | 80% | 2.5 m/s | 4.1 |
| 2014 | 19.9°C | 12.0°C | 4.1°C | 29.9°C | -9.1°C | 30 mm | 62% | 3.6 m/s | 4.9 |
| 2013 | 19.3°C | 12.1°C | 4.9°C | 29.0°C | -3.9°C | 44 mm | 65% | 3.5 m/s | 5.2 |
| 2012 | 22.5°C | 16.4°C | 10.3°C | 28.8°C | 1.4°C | 122 mm | 76% | 3.4 m/s | 4.4 |
| 2011 | 24.0°C | 16.1°C | 8.3°C | 32.1°C | -0.8°C | 2 mm | 58% | 3.8 m/s | 4.9 |
| 2010 | 18.2°C | 11.3°C | 4.4°C | 27.9°C | -2.1°C | 84 mm | 74% | 3.7 m/s | 5.1 |
| 2009 | 21.9°C | 14.8°C | 7.6°C | 32.9°C | -4.3°C | 75 mm | 64% | 4.1 m/s | 4.4 |
| 2008 | 20.6°C | 13.6°C | 6.7°C | 30.0°C | -6.7°C | 156 mm | 72% | 4 m/s | 4.6 |
| 2007 | 22.7°C | 16.6°C | 10.4°C | 27.0°C | -4.9°C | 158 mm | 72% | 3.4 m/s | 4.2 |
| 2006 | 21.4°C | 15.0°C | 8.5°C | 32.8°C | -2.9°C | 98 mm | 65% | 3.8 m/s | 4.5 |
| 2005 | 19.1°C | 12.4°C | 5.7°C | 27.7°C | 0.4°C | 48 mm | 70% | 3.3 m/s | 4.8 |
| 2004 | 21.9°C | 15.7°C | 9.5°C | 28.2°C | 2.3°C | 44 mm | 72% | 3.4 m/s | 4.4 |
| 2003 | 19.7°C | 12.7°C | 5.7°C | 28.4°C | -4.7°C | 25 mm | 72% | 3.1 m/s | 4.8 |
| 2002 | 18.6°C | 11.7°C | 4.7°C | 31.0°C | -9.0°C | 135 mm | 70% | 3.9 m/s | 4.5 |
| 2001 ❄️ | 15.8°C | 10.2°C | 4.5°C | 24.8°C | -0.4°C | 90 mm | 81% | 2.6 m/s | 4 |
| 2000 | 22.2°C | 15.0°C | 7.8°C | 30.0°C | -0.4°C | 74 mm | 68% | 3.5 m/s | 4.5 |
| 1999 | 18.7°C | 12.5°C | 6.2°C | 25.3°C | -0.5°C | 99 mm | 74% | 3.5 m/s | 4.2 |
| 1998 | 17.3°C | 11.0°C | 4.7°C | 27.1°C | -6.0°C | 119 mm | 76% | 4 m/s | 4.5 |
| 1997 | 19.7°C | 13.3°C | 7.0°C | 29.3°C | -1.2°C | 63 mm | 77% | 3.3 m/s | 4.4 |
| 1996 | 19.7°C | 11.5°C | 3.3°C | 32.4°C | -6.3°C | 52 mm | 51% | 4.3 m/s | 5.3 |
| 1995 | 18.4°C | 12.5°C | 6.6°C | 29.1°C | -6.7°C | 100 mm | 77% | 3.6 m/s | 3.7 |
| 1994 | 20.7°C | 13.4°C | 6.2°C | 30.4°C | -3.0°C | 38 mm | 71% | 3.4 m/s | 5 |
| 1993 | 17.7°C | 11.3°C | 4.9°C | 26.5°C | -5.5°C | 74 mm | 77% | 3.4 m/s | 4.7 |
| 1992 | 19.8°C | 13.3°C | 6.8°C | 24.8°C | -2.0°C | 60 mm | 79% | 3.2 m/s | 4.9 |
| 1991 | 21.3°C | 14.0°C | 6.7°C | 29.1°C | 0.3°C | 31 mm | 62% | 3.7 m/s | 4.8 |
| 1990 | 18.7°C | 13.2°C | 7.6°C | 25.8°C | 0.0°C | 152 mm | 79% | 3.4 m/s | 3.5 |
| 1989 | 19.0°C | 12.1°C | 5.3°C | 28.0°C | -8.6°C | 88 mm | 76% | 3.7 m/s | 4.8 |
| 1988 | 20.9°C | 12.4°C | 4.0°C | 31.0°C | -4.9°C | 43 mm | 62% | 4.1 m/s | 5.1 |
| 1987 | 18.0°C | 11.2°C | 4.5°C | 24.7°C | -3.8°C | 39 mm | 70% | 3.2 m/s | 5.1 |
| 1986 | 22.9°C | 15.3°C | 7.6°C | 28.5°C | -1.6°C | 35 mm | 64% | 3.5 m/s | 5.4 |
| 1985 | 21.0°C | 15.0°C | 8.9°C | 30.5°C | 0.9°C | 106 mm | 77% | 3.5 m/s | 4.3 |
| 1984 | 19.3°C | 12.6°C | 5.8°C | 27.2°C | -1.5°C | 93 mm | 71% | 3.6 m/s | 4.7 |
| 1983 | 18.4°C | 12.0°C | 5.5°C | 28.0°C | -3.3°C | 80 mm | 71% | 3.6 m/s | — |
| 1982 | 20.1°C | 13.9°C | 7.7°C | 28.7°C | -3.6°C | 51 mm | 74% | 3.5 m/s | — |
| 1981 | 19.6°C | 13.1°C | 6.6°C | 29.0°C | -1.7°C | 85 mm | 67% | 3.3 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 20.3°C with lows near 6.9°C (mean 13.6°C), based on 45 years of NASA POWER data.
March averages 74 mm of rainfall in Keller, about average for rainfall. The wettest on record was 179 mm in 2020.
The hottest March reached 33.5°C in 2022. The coldest dipped to -9.1°C in 2014.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 1.8°C. Daytime highs moved from 19.7°C to 22.4°C and overnight lows from 6.9°C to 7.9°C over the same span.
March is one of the cooler months of the year in Keller and about average for rainfall, so plan for around 20.3°C daytime highs and 6.9°C at night.
Not quite — March is the 5th coolest month in Keller, averaging 13.6°C.
For March in Keller, pack warm layers and a jacket for chilly mornings, with typical highs of 20.3°C and lows of 6.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 70% — moderately humid.
Average wind speed in March is 3.5 m/s. The windiest March on record averaged 4.3 m/s (1996).
The wettest March on record was 2020 with 179 mm. On average, March sees 74 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 Keller 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.
