March is one of the cooler months of the year in Pasadena, with average highs near 19.4°C and lows around 8.5°C (mean 14°C). It is a relatively wet time of year, averaging 60 mm of rainfall and 66% relative humidity across the period.
March is one of the cooler months of the year in Pasadena. Across 45 years of records, the warmest March in Pasadena was 2015 — when the month averaged 18.2°C — while the coldest was 1991 at 10.6°C. Typical March days reach 19.4°C with nights near 8.5°C. The long-term March temperature trend is broadly flat.
March is a relatively wet time of year in Pasadena, averaging 60 mm of rainfall. The wettest March on record was 2023 with 189 mm, while the driest was 1997 at 0 mm.
Relative humidity in Pasadena during March averages 66%. The most humid March was 1992 at 80%, and the least humid was 1984 at 50%.
March receives about 5.2 kWh/m²/day of solar energy in Pasadena. The sunniest March was 2008 at 6 kWh/m²/day, and the cloudiest was 1992 at 4.3.
Average wind speed in Pasadena during March is 2.3 m/s. The windiest Marchs were 1983 and 1991 at 3 m/s, while the calmest were 2013 and 2015 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.8°C | 13.6°C | 14.2°C | 14.8°C | 13.2°C | -0.6°C |
| Avg High | 19.5°C | 18.8°C | 19.8°C | 20.3°C | 18.0°C | -1.5°C |
| Avg Low | 8.0°C | 8.5°C | 8.5°C | 9.3°C | 8.3°C | +0.3°C |
| Avg Rain | 66 mm | 80 mm | 31 mm | 45 mm | 91 mm | +25 mm |
March temperatures in Pasadena have risen by about 0.3°C between 1981–1985 and 2021–2025.
March has ranged from a record low of 0°C (1991) to a record high of 31.7°C (1988).
Rainfall in March is a relatively wet time of year, averaging 60 mm, with a wettest year of 189 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A quieter season to visit Pasadena
If your dates are flexible, the more temperate months of June and September tend to be the most comfortable for visiting Pasadena. That said, March — with days averaging 19.4°C and nights around 8.5°C (mean 14°C) and moderate rainfall (60 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 | 18.4°C | 13.4°C | 8.3°C | 28.1°C | 3.9°C | 55 mm | 72% | 2.4 m/s | 5 |
| 2024 | 17.1°C | 13.0°C | 8.9°C | 22.2°C | 6.4°C | 101 mm | 80% | 2.2 m/s | 5.1 |
| 2023 🌧️ | 14.9°C | 11.1°C | 7.2°C | 20.1°C | 1.8°C | 189 mm | 79% | 2.5 m/s | 4.6 |
| 2022 | 21.7°C | 15.8°C | 9.8°C | 28.3°C | 3.0°C | 33 mm | 59% | 2.2 m/s | 5.7 |
| 2021 | 18.8°C | 13.0°C | 7.2°C | 28.0°C | 2.6°C | 32 mm | 61% | 2.2 m/s | 5.6 |
| 2020 | 17.0°C | 12.7°C | 8.4°C | 24.0°C | 3.4°C | 134 mm | 75% | 2.2 m/s | 4.5 |
| 2019 | 17.8°C | 13.3°C | 8.8°C | 25.1°C | 5.3°C | 78 mm | 76% | 2.1 m/s | 5.2 |
| 2018 | 18.9°C | 14.0°C | 9.1°C | 25.5°C | 3.0°C | 99 mm | 64% | 2 m/s | 4.9 |
| 2017 | 21.4°C | 15.8°C | 10.2°C | 27.7°C | 2.6°C | 9 mm | 65% | 2.1 m/s | 5.7 |
| 2016 | 21.2°C | 15.5°C | 9.8°C | 27.7°C | 5.3°C | 51 mm | 64% | 2.3 m/s | 5.5 |
| 2015 🔥 | 24.3°C | 18.2°C | 12.0°C | 30.5°C | 6.9°C | 13 mm | 52% | 1.8 m/s | 5.7 |
| 2014 | 21.5°C | 15.9°C | 10.2°C | 28.9°C | 7.4°C | 21 mm | 61% | 2 m/s | 5.5 |
| 2013 | 21.5°C | 15.4°C | 9.3°C | 29.5°C | 4.1°C | 17 mm | 58% | 1.8 m/s | 5.5 |
| 2012 | 18.9°C | 13.1°C | 7.3°C | 28.0°C | 2.4°C | 57 mm | 62% | 2.3 m/s | 5.4 |
| 2011 | 18.4°C | 13.3°C | 8.2°C | 30.1°C | 4.8°C | 95 mm | 71% | 2.3 m/s | 5 |
| 2010 | 19.0°C | 13.4°C | 7.8°C | 25.2°C | 2.5°C | 12 mm | 64% | 2.2 m/s | 5.6 |
| 2009 | 19.3°C | 13.5°C | 7.8°C | 26.7°C | 3.4°C | 8 mm | 63% | 2 m/s | 5.6 |
| 2008 | 20.8°C | 14.5°C | 8.2°C | 27.2°C | 3.8°C | 2 mm | 59% | 2.1 m/s | 6 |
| 2007 | 22.4°C | 16.0°C | 9.6°C | 30.5°C | 1.9°C | 4 mm | 53% | 2 m/s | 5.7 |
| 2006 | 15.5°C | 10.9°C | 6.2°C | 23.5°C | 1.8°C | 70 mm | 70% | 2.2 m/s | 4.8 |
| 2005 | 18.4°C | 13.7°C | 9.0°C | 25.1°C | 6.0°C | 37 mm | 74% | 2.2 m/s | 5.1 |
| 2004 | 24.0°C | 17.7°C | 11.3°C | 30.0°C | 6.7°C | 17 mm | 58% | 1.9 m/s | 5.8 |
| 2003 | 20.3°C | 14.4°C | 8.6°C | 27.3°C | 4.4°C | 61 mm | 64% | 2.3 m/s | 5.7 |
| 2002 | 19.4°C | 13.5°C | 7.5°C | 24.9°C | 3.5°C | 10 mm | 55% | 2.4 m/s | 5.7 |
| 2001 | 19.2°C | 14.1°C | 9.0°C | 27.0°C | 5.8°C | 43 mm | 74% | 2 m/s | 5.2 |
| 2000 | 19.0°C | 13.6°C | 8.2°C | 25.6°C | 4.5°C | 52 mm | 67% | 2.2 m/s | 5.3 |
| 1999 | 17.3°C | 12.2°C | 7.1°C | 24.3°C | 3.1°C | 37 mm | 68% | 2.3 m/s | 5 |
| 1998 | 17.9°C | 13.2°C | 8.5°C | 24.0°C | 2.8°C | 92 mm | 73% | 2.3 m/s | 5.1 |
| 1997 | 22.7°C | 16.1°C | 9.5°C | 29.4°C | 2.6°C | 0 mm | 56% | 2 m/s | 5.6 |
| 1996 | 19.4°C | 13.8°C | 8.3°C | 24.9°C | 3.9°C | 50 mm | 68% | 2 m/s | 5.2 |
| 1995 | 17.9°C | 13.3°C | 8.7°C | 24.4°C | 3.1°C | 177 mm | 73% | 2.5 m/s | 4.9 |
| 1994 | 20.6°C | 15.0°C | 9.5°C | 27.0°C | 3.9°C | 56 mm | 63% | 2 m/s | 5.3 |
| 1993 | 19.8°C | 14.7°C | 9.6°C | 24.6°C | 3.6°C | 59 mm | 72% | 2.1 m/s | 5.1 |
| 1992 | 16.7°C | 13.0°C | 9.3°C | 22.4°C | 6.5°C | 165 mm | 80% | 2.1 m/s | 4.3 |
| 1991 ❄️ | 15.6°C | 10.6°C | 5.5°C | 22.0°C | 0.0°C | 158 mm | 71% | 3 m/s | 4.8 |
| 1990 | 19.7°C | 14.1°C | 8.5°C | 26.4°C | 1.4°C | 6 mm | 60% | 2.2 m/s | 5.1 |
| 1989 | 21.2°C | 15.0°C | 8.7°C | 28.2°C | 2.4°C | 25 mm | 62% | 2.6 m/s | 5.2 |
| 1988 | 22.7°C | 15.6°C | 8.5°C | 31.7°C | 3.9°C | 4 mm | 50% | 2.6 m/s | 5.7 |
| 1987 | 19.5°C | 13.4°C | 7.3°C | 25.5°C | 2.2°C | 31 mm | 59% | 2.6 m/s | 5 |
| 1986 | 20.4°C | 15.1°C | 9.9°C | 27.1°C | 4.3°C | 105 mm | 69% | 2.1 m/s | 4.6 |
| 1985 | 17.9°C | 12.1°C | 6.2°C | 25.7°C | 1.2°C | 25 mm | 62% | 2.5 m/s | 5.1 |
| 1984 | 22.3°C | 15.7°C | 9.1°C | 26.9°C | 6.0°C | 6 mm | 50% | 2.8 m/s | 5.1 |
| 1983 | 16.9°C | 12.4°C | 7.9°C | 23.7°C | 3.9°C | 182 mm | 79% | 3 m/s | — |
| 1982 | 16.6°C | 11.9°C | 7.2°C | 20.9°C | 2.0°C | 136 mm | 68% | 2.5 m/s | — |
| 1981 | 18.3°C | 12.8°C | 7.3°C | 25.0°C | 4.8°C | 77 mm | 68% | 2.4 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 19.4°C with lows near 8.5°C (mean 14°C), based on 45 years of NASA POWER data.
March averages 60 mm of rainfall in Pasadena, a relatively wet time of year. The wettest on record was 189 mm in 2023.
The hottest March reached 31.7°C in 1988. The coldest dipped to 0°C in 1991.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 0.3°C — but days and nights have moved in opposite directions. Overnight lows rose from 7.5°C to 8.3°C while daytime highs eased from 18.4°C to 18.2°C, narrowing the gap between day and night.
March is one of the cooler months of the year in Pasadena and a relatively wet time of year, so plan for around 19.4°C daytime highs and 8.5°C at night.
Not quite — March is the 4th coolest month in Pasadena, averaging 14°C.
For March in Pasadena, pack light layers you can adjust through the day, with typical highs of 19.4°C and lows of 8.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 66% — moderately humid.
Average wind speed in March is 2.3 m/s. The windiest March on record averaged 3 m/s (1983).
The wettest March on record was 2023 with 189 mm. On average, March sees 60 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 Pasadena 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.
