May is one of the warmer months of the year in Doylestown, with average highs near 21.4°C and lows around 9.5°C (mean 15.5°C). It is about average for rainfall, averaging 109 mm of rainfall and 79% relative humidity across the period.
May is one of the warmer months of the year in Doylestown. Across 45 years of records, the warmest May in Doylestown was 2004 — when the month averaged 18.2°C — while the coldest was 1997 at 12.7°C. Typical May days reach 21.4°C with nights near 9.5°C. The long-term trend is warming, about 0.4°C per decade.
May is about average for rainfall in Doylestown, averaging 109 mm of rainfall. The wettest May on record was 1989 with 232 mm, while the driest was 2023 at 14 mm.
Relative humidity in Doylestown during May averages 79%. The most humid May was 2003 at 83%, and the least humid was 2023 at 71%.
May receives about 5.4 kWh/m²/day of solar energy in Doylestown. The sunniest May was 2007 at 6.7 kWh/m²/day, and the cloudiest was 2003 at 3.8.
Average wind speed in Doylestown during May is 0.1 m/s. The windiest Mays were 2023, 2024 and 2025, among others at 0.1 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.9°C | 14.7°C | 15.3°C | 16.5°C | 15.6°C | +0.7°C |
| Avg High | 21.0°C | 20.8°C | 21.4°C | 22.2°C | 21.4°C | +0.4°C |
| Avg Low | 8.9°C | 8.6°C | 9.3°C | 10.8°C | 9.8°C | +0.9°C |
| Avg Rain | 134 mm | 100 mm | 92 mm | 115 mm | 107 mm | -27 mm |
May temperatures in Doylestown have risen by about 1.2°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -0.6°C (2020) to a record high of 32.8°C (1991).
Rainfall in May is about average for rainfall, averaging 109 mm, with a wettest year of 232 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.3°C per decade while lows rose 0.5°C per decade, narrowing the gap between day and night.
A good time to visit Doylestown
May is a good time to visit Doylestown, with days averaging 21.4°C and nights around 9.5°C (mean 15.5°C, warmer than Doylestown's yearly average) and higher rainfall. August and June are marginally more temperate, but May still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 21.2°C | 16.1°C | 10.9°C | 27.2°C | 5.6°C | 217 mm | 81% | 0.1 m/s | 4.7 |
| 2024 | 22.6°C | 17.3°C | 12.0°C | 28.6°C | 5.2°C | 89 mm | 82% | 0.1 m/s | 5 |
| 2023 | 21.6°C | 14.8°C | 8.1°C | 28.0°C | 1.7°C | 14 mm | 71% | 0.1 m/s | 6.4 |
| 2022 | 22.4°C | 16.5°C | 10.6°C | 31.6°C | 2.3°C | 143 mm | 80% | 0.1 m/s | 5.2 |
| 2021 | 21.1°C | 15.2°C | 9.3°C | 31.6°C | 3.2°C | 110 mm | 76% | 0.1 m/s | 5.5 |
| 2020 | 19.4°C | 13.7°C | 8.0°C | 27.0°C | -0.6°C | 69 mm | 76% | 0.1 m/s | 5.6 |
| 2019 | 21.7°C | 16.4°C | 11.0°C | 28.3°C | 3.8°C | 200 mm | 82% | 0.1 m/s | 5 |
| 2018 | 23.6°C | 17.9°C | 12.3°C | 32.0°C | 4.0°C | 150 mm | 82% | 0.1 m/s | 4.9 |
| 2017 | 20.0°C | 14.7°C | 9.4°C | 31.1°C | 2.9°C | 135 mm | 79% | 0.1 m/s | 4.7 |
| 2016 | 20.1°C | 14.9°C | 9.7°C | 29.9°C | 1.8°C | 114 mm | 81% | 0.1 m/s | 4.9 |
| 2015 | 24.4°C | 17.9°C | 11.5°C | 29.8°C | 4.4°C | 38 mm | 75% | 0.1 m/s | 6 |
| 2014 | 21.7°C | 15.7°C | 9.8°C | 27.1°C | 3.6°C | 92 mm | 80% | 0.1 m/s | 5.1 |
| 2013 | 21.3°C | 15.4°C | 9.5°C | 31.0°C | 0.5°C | 98 mm | 79% | 0.1 m/s | 5.8 |
| 2012 | 23.6°C | 18.1°C | 12.6°C | 30.8°C | 5.1°C | 128 mm | 81% | 0.1 m/s | 5.1 |
| 2011 | 22.7°C | 17.3°C | 11.8°C | 32.5°C | 3.8°C | 105 mm | 83% | 0.1 m/s | 5 |
| 2010 | 22.8°C | 16.8°C | 10.8°C | 31.3°C | 0.9°C | 86 mm | 78% | 0.1 m/s | 5.6 |
| 2009 | 21.5°C | 15.9°C | 10.2°C | 26.9°C | 2.0°C | 127 mm | 79% | 0.1 m/s | 4.9 |
| 2008 | 19.7°C | 13.7°C | 7.7°C | 27.6°C | 0.5°C | 111 mm | 79% | 0.1 m/s | 5.3 |
| 2007 | 23.0°C | 16.3°C | 9.7°C | 31.3°C | 3.4°C | 46 mm | 75% | 0.1 m/s | 6.7 |
| 2006 | 21.9°C | 15.7°C | 9.5°C | 31.0°C | 2.8°C | 78 mm | 75% | 0.1 m/s | 5.7 |
| 2005 | 19.1°C | 13.1°C | 7.1°C | 25.4°C | 1.9°C | 41 mm | 78% | 0.1 m/s | 5.8 |
| 2004 🔥 | 24.0°C | 18.2°C | 12.3°C | 29.2°C | 3.5°C | 107 mm | 81% | 0.1 m/s | 5.5 |
| 2003 | 19.0°C | 13.8°C | 8.7°C | 25.9°C | 3.0°C | 101 mm | 83% | 0.1 m/s | 3.8 |
| 2002 | 21.5°C | 14.7°C | 7.9°C | 29.0°C | 1.0°C | 118 mm | 72% | 0.1 m/s | 5.8 |
| 2001 | 22.3°C | 16.0°C | 9.6°C | 31.2°C | 2.7°C | 91 mm | 75% | 0.1 m/s | 5.7 |
| 2000 | 21.6°C | 15.7°C | 9.9°C | 31.6°C | 1.9°C | 103 mm | 79% | 0.1 m/s | 5.2 |
| 1999 | 22.4°C | 15.7°C | 9.0°C | 32.6°C | 2.8°C | 75 mm | 74% | 0.1 m/s | 5.8 |
| 1998 | 22.3°C | 16.8°C | 11.3°C | 29.7°C | 5.2°C | 171 mm | 83% | 0.1 m/s | 5.6 |
| 1997 ❄️ | 18.9°C | 12.7°C | 6.6°C | 27.3°C | 0.8°C | 88 mm | 74% | 0.1 m/s | 5.7 |
| 1996 | 19.3°C | 13.5°C | 7.7°C | 29.7°C | 0.7°C | 77 mm | 80% | 0.1 m/s | 5.1 |
| 1995 | 20.3°C | 14.2°C | 8.1°C | 27.5°C | 1.4°C | 77 mm | 77% | 0.1 m/s | 4.9 |
| 1994 | 19.9°C | 13.5°C | 7.1°C | 28.8°C | 1.9°C | 89 mm | 77% | 0.1 m/s | 5.9 |
| 1993 | 21.6°C | 15.4°C | 9.2°C | 27.9°C | 4.6°C | 45 mm | 78% | 0.1 m/s | 5.6 |
| 1992 | 20.2°C | 13.8°C | 7.4°C | 30.6°C | 0.8°C | 110 mm | 77% | 0.1 m/s | 5.2 |
| 1991 | 24.3°C | 17.9°C | 11.5°C | 32.8°C | 3.9°C | 73 mm | 80% | 0.1 m/s | 6.2 |
| 1990 | 19.1°C | 13.5°C | 7.8°C | 25.7°C | 2.4°C | 200 mm | 79% | 0.1 m/s | 4.8 |
| 1989 🌧️ | 19.9°C | 14.4°C | 8.9°C | 27.7°C | 2.9°C | 232 mm | 83% | 0.1 m/s | 4.4 |
| 1988 | 21.3°C | 15.3°C | 9.4°C | 29.3°C | 1.6°C | 143 mm | 81% | 0.1 m/s | 5.2 |
| 1987 | 20.9°C | 14.8°C | 8.8°C | 30.4°C | 1.2°C | 63 mm | 82% | 0.1 m/s | 5.3 |
| 1986 | 22.1°C | 15.8°C | 9.5°C | 28.7°C | -0.4°C | 43 mm | 78% | 0.1 m/s | 6.2 |
| 1985 | 22.3°C | 15.9°C | 9.5°C | 28.2°C | 0.1°C | 144 mm | 75% | 0.1 m/s | 5.8 |
| 1984 | 19.4°C | 13.8°C | 8.3°C | 26.9°C | 2.0°C | 226 mm | 82% | 0.1 m/s | 4.1 |
| 1983 | 19.5°C | 13.7°C | 7.8°C | 25.6°C | -0.1°C | 140 mm | 82% | 0.1 m/s | — |
| 1982 | 22.0°C | 15.9°C | 9.8°C | 27.3°C | 4.7°C | 91 mm | 79% | 0.1 m/s | — |
| 1981 | 21.5°C | 14.8°C | 8.1°C | 27.4°C | 1.0°C | 126 mm | 75% | 0.1 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 21.4°C with lows near 9.5°C (mean 15.5°C), based on 45 years of NASA POWER data.
May averages 109 mm of rainfall in Doylestown, about average for rainfall. The wettest on record was 232 mm in 1989.
The hottest May reached 32.8°C in 1991. The coldest dipped to -0.6°C in 2020.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.2°C. Daytime highs moved from 20.9°C to 21.8°C and overnight lows from 8.7°C to 10.2°C over the same span.
May is one of the warmer months of the year in Doylestown and about average for rainfall, so plan for around 21.4°C daytime highs and 9.5°C at night.
Not quite — May is the 8th coolest month in Doylestown, averaging 15.5°C.
For May in Doylestown, pack light layers you can adjust through the day, with typical highs of 21.4°C and lows of 9.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 79% — quite humid.
Average wind speed in May is 0.1 m/s. The windiest May on record averaged 0.1 m/s (1981).
The wettest May on record was 1989 with 232 mm. On average, May sees 109 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 Doylestown behaves each May, 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 May specifically, along with year-by-year records and how the month has changed over the decades.
