May is one of the warmer months of the year in Orange, with average highs near 28.3°C and lows around 21.2°C (mean 24.8°C). It is a relatively wet time of year, averaging 149 mm of rainfall and 78% relative humidity across the period.
May is one of the warmer months of the year in Orange. Across 45 years of records, the warmest May in Orange was 2022 — when the month averaged 27°C — while the coldest was 1993 at 22.7°C. Typical May days reach 28.3°C with nights near 21.2°C. The long-term trend is warming, about 0.2°C per decade.
May is a relatively wet time of year in Orange, averaging 149 mm of rainfall. The wettest May on record was 2021 with 433 mm, while the driest was 1998 at 2 mm.
Relative humidity in Orange during May averages 78%. The most humid May was 1991 at 87%, and the least humid was 1988 at 69%.
May receives about 5.8 kWh/m²/day of solar energy in Orange. The sunniest May was 2011 at 6.8 kWh/m²/day, and the cloudiest was 2024 at 4.7.
Average wind speed in Orange during May is 2.5 m/s. The windiest May was 2011 at 3.2 m/s, while the calmest was 2023 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 24.4°C | 24.5°C | 25.0°C | 24.9°C | 25.2°C | +0.8°C |
| Avg High | 28.1°C | 27.9°C | 28.5°C | 28.5°C | 28.5°C | +0.4°C |
| Avg Low | 20.6°C | 21.1°C | 21.4°C | 21.3°C | 21.9°C | +1.3°C |
| Avg Rain | 145 mm | 136 mm | 110 mm | 154 mm | 237 mm | +92 mm |
May temperatures in Orange have risen by about 1.2°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 10°C (2013) to a record high of 35.9°C (1998).
Rainfall in May is a relatively wet time of year, averaging 149 mm, with a wettest year of 433 mm.
One of the best times to visit Orange
May is one of the best times to visit Orange. Expect days averaging 28.3°C and nights around 21.2°C (mean 24.8°C) — warmer than Orange's yearly average — with higher rainfall (149 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 28.0°C | 24.9°C | 21.8°C | 31.3°C | 15.4°C | 255 mm | 83% | 2.5 m/s | 5.4 |
| 2024 | 28.8°C | 25.9°C | 23.1°C | 33.6°C | 20.3°C | 338 mm | 86% | 2.5 m/s | 4.7 |
| 2023 | 28.7°C | 25.1°C | 21.6°C | 32.0°C | 15.9°C | 126 mm | 79% | 1.8 m/s | 5.7 |
| 2022 🔥 | 31.0°C | 27.0°C | 23.0°C | 33.3°C | 19.6°C | 102 mm | 74% | 2.7 m/s | 6.4 |
| 2021 🌧️ | 27.0°C | 24.1°C | 21.3°C | 29.5°C | 16.1°C | 433 mm | 84% | 2.8 m/s | 5 |
| 2020 | 27.6°C | 24.2°C | 20.7°C | 30.4°C | 15.4°C | 165 mm | 80% | 2.6 m/s | 5.9 |
| 2019 | 28.4°C | 25.3°C | 22.3°C | 32.3°C | 17.0°C | 315 mm | 82% | 2.8 m/s | 5.7 |
| 2018 | 31.0°C | 26.7°C | 22.4°C | 34.5°C | 18.0°C | 56 mm | 72% | 2.1 m/s | 6.6 |
| 2017 | 27.2°C | 23.6°C | 20.0°C | 29.9°C | 13.0°C | 298 mm | 78% | 2.6 m/s | 6.1 |
| 2016 | 27.4°C | 24.3°C | 21.3°C | 29.9°C | 14.9°C | 236 mm | 82% | 2.3 m/s | 5.5 |
| 2015 | 27.5°C | 24.8°C | 22.2°C | 29.3°C | 15.4°C | 201 mm | 84% | 2.6 m/s | 5.1 |
| 2014 | 27.9°C | 24.0°C | 20.1°C | 30.8°C | 11.2°C | 107 mm | 73% | 2.8 m/s | 6.1 |
| 2013 | 26.5°C | 23.1°C | 19.6°C | 30.3°C | 10.0°C | 165 mm | 79% | 2.7 m/s | 6 |
| 2012 | 29.3°C | 25.5°C | 21.8°C | 32.7°C | 18.6°C | 81 mm | 75% | 2.1 m/s | 6.3 |
| 2011 | 29.3°C | 25.1°C | 20.9°C | 34.9°C | 11.9°C | 23 mm | 70% | 3.2 m/s | 6.8 |
| 2010 | 30.8°C | 26.6°C | 22.4°C | 35.0°C | 17.1°C | 64 mm | 72% | 2.5 m/s | 6.3 |
| 2009 | 28.1°C | 24.7°C | 21.2°C | 31.1°C | 13.9°C | 74 mm | 79% | 2.4 m/s | 5.9 |
| 2008 | 28.8°C | 25.0°C | 21.3°C | 31.8°C | 15.0°C | 112 mm | 76% | 2.7 m/s | 5.9 |
| 2007 | 27.0°C | 24.1°C | 21.1°C | 30.8°C | 14.7°C | 136 mm | 79% | 2.3 m/s | 5.7 |
| 2006 | 28.7°C | 25.0°C | 21.2°C | 31.0°C | 14.9°C | 140 mm | 75% | 2.5 m/s | 6.1 |
| 2005 | 29.3°C | 24.7°C | 20.2°C | 35.5°C | 12.2°C | 75 mm | 71% | 2.2 m/s | 6.7 |
| 2004 | 27.2°C | 24.2°C | 21.2°C | 31.1°C | 13.9°C | 226 mm | 83% | 2.7 m/s | 5.8 |
| 2003 | 30.5°C | 26.4°C | 22.3°C | 33.3°C | 18.6°C | 9 mm | 75% | 2.7 m/s | 5.5 |
| 2002 | 28.9°C | 25.1°C | 21.2°C | 31.3°C | 12.3°C | 55 mm | 72% | 2.9 m/s | 5.9 |
| 2001 | 28.6°C | 25.0°C | 21.4°C | 31.4°C | 16.6°C | 74 mm | 76% | 2.6 m/s | 6.3 |
| 2000 | 28.3°C | 25.4°C | 22.6°C | 32.5°C | 16.4°C | 201 mm | 83% | 2.7 m/s | 6 |
| 1999 | 29.1°C | 25.3°C | 21.5°C | 33.1°C | 15.0°C | 133 mm | 75% | 2.4 m/s | 6 |
| 1998 | 30.8°C | 26.3°C | 21.8°C | 35.9°C | 17.3°C | 2 mm | 74% | 2.3 m/s | 6.5 |
| 1997 | 26.6°C | 23.5°C | 20.3°C | 29.7°C | 13.9°C | 144 mm | 83% | 2.2 m/s | 5.8 |
| 1996 | 29.9°C | 26.2°C | 22.4°C | 33.8°C | 14.5°C | 31 mm | 75% | 2.8 m/s | 6.3 |
| 1995 | 28.1°C | 24.8°C | 21.6°C | 30.9°C | 14.4°C | 202 mm | 82% | 2.6 m/s | 5.4 |
| 1994 | 27.7°C | 24.3°C | 20.8°C | 30.3°C | 14.8°C | 162 mm | 79% | 2.1 m/s | 5.7 |
| 1993 ❄️ | 25.9°C | 22.7°C | 19.4°C | 28.6°C | 13.0°C | 147 mm | 82% | 2.4 m/s | 5.4 |
| 1992 | 26.2°C | 23.0°C | 19.9°C | 30.0°C | 10.6°C | 88 mm | 80% | 2 m/s | 5.8 |
| 1991 | 27.4°C | 24.9°C | 22.3°C | 31.7°C | 14.9°C | 291 mm | 87% | 2.5 m/s | 4.9 |
| 1990 | 27.3°C | 24.3°C | 21.4°C | 30.3°C | 15.4°C | 158 mm | 84% | 2.8 m/s | 5.3 |
| 1989 | 28.5°C | 25.0°C | 21.6°C | 32.6°C | 15.9°C | 224 mm | 81% | 2.6 m/s | 5.8 |
| 1988 | 28.5°C | 23.8°C | 19.1°C | 32.3°C | 13.7°C | 29 mm | 69% | 2.3 m/s | 6.5 |
| 1987 | 27.9°C | 24.9°C | 21.9°C | 30.9°C | 18.6°C | 151 mm | 80% | 1.9 m/s | 5.3 |
| 1986 | 28.1°C | 24.4°C | 20.8°C | 31.3°C | 14.4°C | 162 mm | 78% | 2.4 m/s | 5.4 |
| 1985 | 28.9°C | 25.0°C | 21.1°C | 33.3°C | 15.0°C | 82 mm | 72% | 2.3 m/s | 6.1 |
| 1984 | 27.8°C | 24.0°C | 20.2°C | 33.3°C | 13.0°C | 176 mm | 76% | 2.8 m/s | 5.7 |
| 1983 | 27.5°C | 23.8°C | 20.1°C | 29.8°C | 13.8°C | 244 mm | 77% | 2.7 m/s | — |
| 1982 | 27.3°C | 24.2°C | 21.1°C | 32.4°C | 13.2°C | 140 mm | 79% | 2.4 m/s | — |
| 1981 | 28.5°C | 24.2°C | 19.9°C | 33.1°C | 12.7°C | 96 mm | 72% | 2.6 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 28.3°C with lows near 21.2°C (mean 24.8°C), based on 45 years of NASA POWER data.
May averages 149 mm of rainfall in Orange, a relatively wet time of year. The wettest on record was 433 mm in 2021.
The hottest May reached 35.9°C in 1998. The coldest dipped to 10°C in 2013.
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 28°C to 28.7°C and overnight lows from 20.5°C to 22.2°C over the same span.
May is one of the warmer months of the year in Orange and a relatively wet time of year, so plan for around 28.3°C daytime highs and 21.2°C at night.
Not quite — May is the 8th coolest month in Orange, averaging 24.8°C.
For May in Orange, pack light layers you can adjust through the day, with typical highs of 28.3°C and lows of 21.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 78% — quite humid.
Average wind speed in May is 2.5 m/s. The windiest May on record averaged 3.2 m/s (2011).
The wettest May on record was 2021 with 433 mm. On average, May sees 149 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 Orange 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.
