March is one of the cooler months of the year in Thornton, with average highs near 7.7°C and lows around 3.8°C (mean 5.8°C). It is about average for rainfall, averaging 86 mm of rainfall and 89% relative humidity across the period.
March is one of the cooler months of the year in Thornton. Across 45 years of records, the warmest March in Thornton was 2012 — when the month averaged 7.7°C — while the coldest was 2013 at 2.6°C. Typical March days reach 7.7°C with nights near 3.8°C. The long-term trend is warming, about 0.3°C per decade.
March is about average for rainfall in Thornton, averaging 86 mm of rainfall. The wettest March on record was 1981 with 163 mm, while the driest was 2025 at 30 mm.
Relative humidity in Thornton during March averages 89%. The most humid March was 1991 at 92%, and the least humid was 2013 at 86%.
March receives about 2.4 kWh/m²/day of solar energy in Thornton. The sunniest March was 2025 at 3 kWh/m²/day, and the cloudiest was 1991 at 1.8.
Average wind speed in Thornton during March is 5.1 m/s. The windiest March was 1994 at 7 m/s, while the calmest was 2011 at 3.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 4.8°C | 6.0°C | 5.9°C | 5.7°C | 6.7°C | +1.9°C |
| Avg High | 6.6°C | 7.8°C | 7.9°C | 7.7°C | 8.8°C | +2.2°C |
| Avg Low | 3.1°C | 4.1°C | 3.9°C | 3.7°C | 4.6°C | +1.5°C |
| Avg Rain | 106 mm | 84 mm | 74 mm | 84 mm | 84 mm | -22 mm |
March temperatures in Thornton have risen by about 1.8°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -3.3°C (2018) to a record high of 15°C (2012).
Rainfall in March is about average for rainfall, averaging 86 mm, with a wettest year of 163 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.4°C per decade while lows rose 0.2°C per decade, widening the gap between day and night.
A quieter season to visit Thornton
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Thornton. That said, March — with days averaging 7.7°C and nights around 3.8°C (mean 5.8°C) and higher rainfall (86 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 | 9.7°C | 7.2°C | 4.7°C | 13.0°C | 0.8°C | 30 mm | 87% | 4 m/s | 3 |
| 2024 | 8.8°C | 7.1°C | 5.3°C | 11.3°C | 2.0°C | 115 mm | 90% | 5.2 m/s | 2.3 |
| 2023 | 7.9°C | 6.2°C | 4.5°C | 11.8°C | 0.5°C | 139 mm | 87% | 4.8 m/s | 2.3 |
| 2022 | 9.9°C | 7.2°C | 4.6°C | 14.7°C | 0.5°C | 40 mm | 86% | 4.3 m/s | 2.8 |
| 2021 | 8.3°C | 6.5°C | 4.7°C | 12.8°C | 1.0°C | 103 mm | 89% | 4.8 m/s | 2.4 |
| 2020 | 8.4°C | 6.0°C | 3.7°C | 12.5°C | 1.4°C | 77 mm | 87% | 5.2 m/s | 2.8 |
| 2019 | 8.5°C | 6.8°C | 5.1°C | 11.2°C | 3.2°C | 162 mm | 89% | 5.6 m/s | 2.4 |
| 2018 | 6.0°C | 4.0°C | 2.1°C | 10.8°C | -3.3°C | 82 mm | 89% | 5.2 m/s | 2.3 |
| 2017 | 9.1°C | 7.1°C | 5.2°C | 12.5°C | 2.6°C | 140 mm | 90% | 4.7 m/s | 2.5 |
| 2016 | 7.4°C | 5.4°C | 3.3°C | 11.1°C | 0.4°C | 78 mm | 89% | 4 m/s | 2.5 |
| 2015 | 7.5°C | 5.3°C | 3.2°C | 10.2°C | 0.5°C | 91 mm | 87% | 5.5 m/s | 2.4 |
| 2014 | 8.6°C | 6.6°C | 4.5°C | 12.7°C | 1.4°C | 71 mm | 89% | 5.1 m/s | 2.6 |
| 2013 ❄️ | 4.4°C | 2.6°C | 0.7°C | 7.3°C | -1.4°C | 62 mm | 86% | 5.2 m/s | 2.3 |
| 2012 🔥 | 9.9°C | 7.7°C | 5.4°C | 15.0°C | 2.1°C | 31 mm | 88% | 3.6 m/s | 2.7 |
| 2011 | 8.1°C | 6.0°C | 3.9°C | 12.3°C | 0.6°C | 47 mm | 88% | 3.3 m/s | 2.7 |
| 2010 | 7.1°C | 5.2°C | 3.3°C | 10.4°C | -1.5°C | 77 mm | 89% | 3.9 m/s | 2.5 |
| 2009 | 7.8°C | 6.0°C | 4.3°C | 10.9°C | 0.7°C | 62 mm | 89% | 5.2 m/s | 2.6 |
| 2008 | 7.3°C | 5.5°C | 3.7°C | 9.8°C | 0.4°C | 104 mm | 86% | 6.4 m/s | 2.4 |
| 2007 | 8.7°C | 6.6°C | 4.6°C | 12.4°C | -0.1°C | 74 mm | 88% | 5.6 m/s | 2.7 |
| 2006 | 6.1°C | 4.3°C | 2.5°C | 10.7°C | -0.4°C | 137 mm | 87% | 5.3 m/s | 2.2 |
| 2005 | 8.7°C | 6.7°C | 4.7°C | 13.7°C | -0.3°C | 61 mm | 89% | 4.7 m/s | 2.2 |
| 2004 | 7.9°C | 5.8°C | 3.8°C | 12.5°C | 0.7°C | 66 mm | 89% | 5.1 m/s | 2.4 |
| 2003 | 9.1°C | 6.6°C | 4.0°C | 12.6°C | 0.3°C | 41 mm | 89% | 4.2 m/s | 2.9 |
| 2002 | 8.6°C | 6.5°C | 4.4°C | 11.1°C | 0.7°C | 55 mm | 89% | 5.1 m/s | 2.6 |
| 2001 | 6.3°C | 4.4°C | 2.4°C | 10.0°C | -2.7°C | 68 mm | 88% | 4.7 m/s | 2.5 |
| 2000 | 8.4°C | 6.6°C | 4.8°C | 11.1°C | 1.0°C | 67 mm | 88% | 5.1 m/s | 2.4 |
| 1999 | 7.7°C | 6.0°C | 4.4°C | 12.3°C | 0.7°C | 94 mm | 91% | 4.8 m/s | 2.4 |
| 1998 | 9.0°C | 7.2°C | 5.3°C | 13.1°C | 1.0°C | 135 mm | 90% | 4.8 m/s | 2.1 |
| 1997 | 9.0°C | 7.0°C | 5.1°C | 12.2°C | 1.2°C | 57 mm | 91% | 5.2 m/s | 2.4 |
| 1996 | 6.1°C | 3.8°C | 1.6°C | 8.4°C | -1.8°C | 50 mm | 87% | 4.8 m/s | 2 |
| 1995 | 6.4°C | 4.7°C | 3.0°C | 10.3°C | -0.8°C | 92 mm | 87% | 6.1 m/s | 2.1 |
| 1994 | 7.1°C | 5.6°C | 4.1°C | 9.8°C | 1.0°C | 119 mm | 89% | 7 m/s | 2.1 |
| 1993 | 7.6°C | 5.6°C | 3.6°C | 11.7°C | 0.2°C | 36 mm | 88% | 5.1 m/s | 2.2 |
| 1992 | 7.9°C | 6.3°C | 4.6°C | 9.6°C | 2.0°C | 111 mm | 90% | 6.1 m/s | 2 |
| 1991 | 8.6°C | 6.5°C | 4.4°C | 11.5°C | 1.4°C | 103 mm | 92% | 4.3 m/s | 1.8 |
| 1990 | 8.7°C | 7.0°C | 5.2°C | 13.2°C | 0.6°C | 41 mm | 88% | 6.6 m/s | 2.3 |
| 1989 | 8.0°C | 6.2°C | 4.4°C | 11.1°C | -0.5°C | 126 mm | 88% | 5.8 m/s | 2.1 |
| 1988 | 6.4°C | 4.8°C | 3.2°C | 9.0°C | 0.1°C | 115 mm | 90% | 5 m/s | 2.1 |
| 1987 | 5.2°C | 3.5°C | 1.7°C | 9.8°C | -1.4°C | 124 mm | 89% | 5.7 m/s | 2.4 |
| 1986 | 5.7°C | 3.9°C | 2.1°C | 8.7°C | -3.1°C | 102 mm | 90% | 5.8 m/s | 2.5 |
| 1985 | 6.0°C | 4.2°C | 2.3°C | 9.6°C | -0.9°C | 55 mm | 88% | 4.7 m/s | 2.3 |
| 1984 | 6.0°C | 4.0°C | 2.1°C | 8.1°C | -0.1°C | 49 mm | 88% | 3.9 m/s | 2.2 |
| 1983 | 6.7°C | 5.3°C | 4.0°C | 9.0°C | 1.0°C | 106 mm | 91% | 5.4 m/s | — |
| 1982 | 7.4°C | 5.4°C | 3.5°C | 10.5°C | 1.5°C | 110 mm | 88% | 5.3 m/s | — |
| 1981 🌧️ | 8.0°C | 6.2°C | 4.4°C | 10.8°C | 0.5°C | 163 mm | 91% | 5.3 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 7.7°C with lows near 3.8°C (mean 5.8°C), based on 45 years of NASA POWER data.
March averages 86 mm of rainfall in Thornton, about average for rainfall. The wettest on record was 163 mm in 1981.
The hottest March reached 15°C in 2012. The coldest dipped to -3.3°C in 2018.
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 6.8°C to 8.9°C and overnight lows from 3.3°C to 4.8°C over the same span.
March is one of the cooler months of the year in Thornton and about average for rainfall, so plan for around 7.7°C daytime highs and 3.8°C at night.
Not quite — March is the 3rd coolest month in Thornton, averaging 5.8°C.
For March in Thornton, pack warm layers and a jacket for chilly mornings, with typical highs of 7.7°C and lows of 3.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 89% — quite humid.
Average wind speed in March is 5.1 m/s. The windiest March on record averaged 7 m/s (1994).
The wettest March on record was 1981 with 163 mm. On average, March sees 86 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 Thornton 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.
