March is one of the cooler months of the year in Hartford, with average highs near 6.5°C and lows around -3.8°C (mean 1.4°C). It is about average for rainfall, averaging 102 mm of rainfall and 83% relative humidity across the period.
March is one of the cooler months of the year in Hartford. Across 45 years of records, the warmest March in Hartford was 2012 — when the month averaged 6.2°C — while the coldest was 1984 at -3.3°C. Typical March days reach 6.5°C with nights near -3.8°C. The long-term trend is warming, about 0.4°C per decade.
March is about average for rainfall in Hartford, averaging 102 mm of rainfall. The wettest March on record was 2010 with 237 mm, while the driest was 1981 at 17 mm.
Relative humidity in Hartford during March averages 83%. The most humid March was 1993 at 92%, and the least humid was 1985 at 73%.
March receives about 3.8 kWh/m²/day of solar energy in Hartford. The sunniest March was 2021 at 4.5 kWh/m²/day, and the cloudiest was 2001 at 3.1.
Average wind speed in Hartford during March is 0.4 m/s. The windiest Marchs were 2017, 2018 and 2025, among others at 0.5 m/s, while the calmest were 2022, 2023 and 2024, among others at 0.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 0.8°C | 0.9°C | 1.3°C | 1.3°C | 3.1°C | +2.3°C |
| Avg High | 5.9°C | 6.0°C | 6.5°C | 6.3°C | 8.5°C | +2.6°C |
| Avg Low | -4.3°C | -4.2°C | -3.8°C | -3.6°C | -2.3°C | +2°C |
| Avg Rain | 97 mm | 112 mm | 97 mm | 95 mm | 110 mm | +13 mm |
March temperatures in Hartford have risen by about 2.5°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -24.5°C (2015) to a record high of 25.9°C (1998).
Rainfall in March is about average for rainfall, averaging 102 mm, with a wettest year of 237 mm.
A quieter season to visit Hartford
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Hartford. That said, March — with days averaging 6.5°C and nights around -3.8°C (mean 1.4°C) and higher rainfall (102 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 | 9.9°C | 4.0°C | -2.0°C | 19.7°C | -12.1°C | 94 mm | 78% | 0.5 m/s | 3.8 |
| 2024 | 8.6°C | 3.7°C | -1.2°C | 17.2°C | -6.1°C | 218 mm | 86% | 0.4 m/s | 3.8 |
| 2023 | 6.6°C | 2.0°C | -2.7°C | 13.5°C | -8.1°C | 108 mm | 84% | 0.4 m/s | 3.9 |
| 2022 | 7.9°C | 2.4°C | -3.1°C | 20.6°C | -12.4°C | 83 mm | 83% | 0.4 m/s | 3.7 |
| 2021 | 8.8°C | 2.7°C | -3.3°C | 21.7°C | -11.2°C | 57 mm | 78% | 0.4 m/s | 4.5 |
| 2020 | 9.2°C | 3.7°C | -1.8°C | 17.2°C | -9.6°C | 98 mm | 83% | 0.4 m/s | 3.8 |
| 2019 | 5.2°C | 0.2°C | -4.7°C | 15.4°C | -15.0°C | 64 mm | 85% | 0.4 m/s | 4 |
| 2018 | 5.1°C | 0.8°C | -3.4°C | 14.1°C | -12.1°C | 84 mm | 85% | 0.5 m/s | 3.6 |
| 2017 | 3.7°C | -1.2°C | -6.1°C | 14.8°C | -14.6°C | 93 mm | 79% | 0.5 m/s | 3.8 |
| 2016 | 10.2°C | 4.5°C | -1.2°C | 20.3°C | -8.3°C | 64 mm | 80% | 0.4 m/s | 4 |
| 2015 | 2.5°C | -2.4°C | -7.4°C | 9.4°C | -24.5°C | 70 mm | 86% | 0.4 m/s | 3.7 |
| 2014 | 3.7°C | -1.7°C | -7.1°C | 11.9°C | -17.0°C | 116 mm | 79% | 0.4 m/s | 3.6 |
| 2013 | 4.9°C | 0.6°C | -3.8°C | 11.4°C | -10.4°C | 64 mm | 83% | 0.4 m/s | 3.7 |
| 2012 🔥 | 11.7°C | 6.2°C | 0.7°C | 23.7°C | -10.0°C | 36 mm | 83% | 0.4 m/s | 3.9 |
| 2011 | 6.1°C | 1.3°C | -3.5°C | 15.7°C | -13.5°C | 117 mm | 84% | 0.4 m/s | 3.9 |
| 2010 🌧️ | 9.4°C | 4.7°C | 0.0°C | 18.7°C | -5.5°C | 237 mm | 86% | 0.4 m/s | 3.4 |
| 2009 | 6.9°C | 1.7°C | -3.4°C | 16.0°C | -15.4°C | 64 mm | 82% | 0.4 m/s | 3.9 |
| 2008 | 6.0°C | 1.2°C | -3.5°C | 14.7°C | -8.9°C | 149 mm | 84% | 0.4 m/s | 3.9 |
| 2007 | 5.1°C | -0.6°C | -6.2°C | 17.0°C | -19.4°C | 128 mm | 86% | 0.4 m/s | 3.8 |
| 2006 | 6.5°C | 1.3°C | -4.0°C | 17.8°C | -10.4°C | 18 mm | 81% | 0.4 m/s | 4.3 |
| 2005 | 4.1°C | -0.8°C | -5.7°C | 14.9°C | -12.8°C | 101 mm | 86% | 0.4 m/s | 3.6 |
| 2004 | 7.2°C | 2.3°C | -2.6°C | 18.2°C | -10.8°C | 83 mm | 84% | 0.4 m/s | 3.4 |
| 2003 | 7.4°C | 1.3°C | -4.8°C | 19.6°C | -18.0°C | 89 mm | 85% | 0.4 m/s | 3.9 |
| 2002 | 8.7°C | 3.4°C | -2.0°C | 17.4°C | -8.7°C | 83 mm | 75% | 0.4 m/s | 3.5 |
| 2001 | 3.7°C | -0.3°C | -4.3°C | 12.9°C | -9.7°C | 164 mm | 86% | 0.4 m/s | 3.1 |
| 2000 | 9.8°C | 4.0°C | -1.8°C | 19.4°C | -11.6°C | 94 mm | 81% | 0.4 m/s | 3.8 |
| 1999 | 6.7°C | 1.5°C | -3.7°C | 18.7°C | -12.5°C | 109 mm | 82% | 0.5 m/s | 4.1 |
| 1998 | 7.4°C | 2.5°C | -2.3°C | 25.9°C | -13.6°C | 131 mm | 87% | 0.4 m/s | 3.7 |
| 1997 | 4.9°C | 0.4°C | -4.2°C | 15.9°C | -11.4°C | 139 mm | 84% | 0.4 m/s | 3.6 |
| 1996 | 3.9°C | -1.1°C | -6.2°C | 11.4°C | -20.4°C | 75 mm | 85% | 0.4 m/s | 3.8 |
| 1995 | 7.8°C | 2.5°C | -2.9°C | 14.9°C | -10.4°C | 53 mm | 86% | 0.4 m/s | 3.7 |
| 1994 | 4.8°C | 0.1°C | -4.7°C | 15.3°C | -15.5°C | 145 mm | 90% | 0.4 m/s | 3.6 |
| 1993 | 3.5°C | -1.4°C | -6.4°C | 17.9°C | -20.1°C | 162 mm | 92% | 0.4 m/s | 3.8 |
| 1992 | 5.2°C | 0.0°C | -5.2°C | 15.1°C | -11.9°C | 108 mm | 82% | 0.4 m/s | 3.5 |
| 1991 | 7.6°C | 2.5°C | -2.7°C | 19.0°C | -9.4°C | 128 mm | 85% | 0.4 m/s | 3.2 |
| 1990 | 8.1°C | 2.3°C | -3.5°C | 20.7°C | -16.0°C | 71 mm | 84% | 0.4 m/s | 3.8 |
| 1989 | 5.6°C | 0.3°C | -5.0°C | 21.1°C | -14.3°C | 87 mm | 82% | 0.4 m/s | 3.5 |
| 1988 | 6.8°C | 1.4°C | -4.1°C | 16.9°C | -13.4°C | 75 mm | 81% | 0.4 m/s | 4.2 |
| 1987 | 7.4°C | 2.1°C | -3.1°C | 18.5°C | -13.6°C | 131 mm | 85% | 0.4 m/s | 3.5 |
| 1986 | 6.9°C | 1.1°C | -4.7°C | 18.6°C | -17.4°C | 90 mm | 86% | 0.4 m/s | 4.2 |
| 1985 | 7.5°C | 2.2°C | -3.0°C | 19.5°C | -11.2°C | 74 mm | 73% | 0.4 m/s | 4.2 |
| 1984 ❄️ | 0.7°C | -3.3°C | -7.2°C | 8.8°C | -19.1°C | 128 mm | 90% | 0.5 m/s | 3.6 |
| 1983 | 6.4°C | 2.1°C | -2.3°C | 12.9°C | -9.3°C | 190 mm | 85% | 0.5 m/s | — |
| 1982 | 5.9°C | 0.3°C | -5.3°C | 15.3°C | -17.1°C | 82 mm | 84% | 0.4 m/s | — |
| 1981 | 6.1°C | 1.2°C | -3.8°C | 19.9°C | -10.0°C | 17 mm | 81% | 0.4 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 6.5°C with lows near -3.8°C (mean 1.4°C), based on 45 years of NASA POWER data.
March averages 102 mm of rainfall in Hartford, about average for rainfall. The wettest on record was 237 mm in 2010.
The hottest March reached 25.9°C in 1998. The coldest dipped to -24.5°C in 2015.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 2.5°C. Daytime highs moved from 5.3°C to 8.4°C and overnight lows from -4.3°C to -2.5°C over the same span.
March is one of the cooler months of the year in Hartford and about average for rainfall, so plan for around 6.5°C daytime highs and -3.8°C at night.
Not quite — March is the 4th coolest month in Hartford, averaging 1.4°C.
For March in Hartford, pack warm layers and a jacket for chilly mornings, with typical highs of 6.5°C and lows of -3.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 83% — quite humid.
Average wind speed in March is 0.4 m/s. The windiest March on record averaged 0.5 m/s (1983).
The wettest March on record was 2010 with 237 mm. On average, March sees 102 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 Hartford 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.
