May is close to Hemet's year-round average, with average highs near 25.7°C and lows around 9.1°C (mean 17.4°C). It is one of the drier months, averaging 8 mm of rainfall and 57% relative humidity across the period.
May is close to Hemet's year-round average. Across 45 years of records, the warmest May in Hemet was 1997 — when the month averaged 21.7°C — while the coldest was 1998 at 13.2°C. Typical May days reach 25.7°C with nights near 9.1°C. The long-term May temperature trend is broadly flat.
May is one of the drier months in Hemet, averaging 8 mm of rainfall. The wettest May on record was 1998 with 58 mm, while the driest were 2007 and 2009 at 0 mm.
Relative humidity in Hemet during May averages 57%. The most humid May was 1998 at 75%, and the least humid was 1984 at 36%.
May receives about 7.8 kWh/m²/day of solar energy in Hemet. The sunniest May was 2020 at 8.4 kWh/m²/day, and the cloudiest was 1995 at 6.9.
Average wind speed in Hemet during May is 1.4 m/s. The windiest Mays were 2011, 2018 and 2019, among others at 1.6 m/s, while the calmest were 1997, 2001 and 2009, among others at 1.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 17.7°C | 16.5°C | 18.6°C | 16.9°C | 17.7°C | 0°C |
| Avg High | 26.3°C | 24.5°C | 27.2°C | 24.8°C | 26.0°C | -0.3°C |
| Avg Low | 9.0°C | 8.5°C | 9.9°C | 8.9°C | 9.5°C | +0.5°C |
| Avg Rain | 4 mm | 13 mm | 5 mm | 12 mm | 4 mm | 0 mm |
May temperatures in Hemet have stayed relatively stable across the record.
May has ranged from a record low of 1.1°C (2003) to a record high of 38.4°C (2003).
Rainfall in May is one of the drier months, averaging 8 mm, with a wettest year of 58 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.1°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A good time to visit Hemet
May is a good time to visit Hemet, with days averaging 25.7°C and nights around 9.1°C (mean 17.4°C, close to Hemet's yearly average) and low rainfall. June and September 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 | 26.9°C | 18.8°C | 10.7°C | 35.8°C | 7.3°C | 7 mm | 59% | 1.4 m/s | 7.5 |
| 2024 | 24.6°C | 16.4°C | 8.3°C | 30.3°C | 5.0°C | 3 mm | 65% | 1.3 m/s | 8 |
| 2023 | 23.2°C | 16.2°C | 9.2°C | 30.7°C | 5.4°C | 12 mm | 69% | 1.5 m/s | 7.6 |
| 2022 | 27.1°C | 18.3°C | 9.4°C | 34.8°C | 3.2°C | 0 mm | 52% | 1.3 m/s | 8.2 |
| 2021 | 27.0°C | 18.1°C | 9.3°C | 33.6°C | 3.9°C | 1 mm | 53% | 1.4 m/s | 8.2 |
| 2020 | 27.2°C | 18.7°C | 10.2°C | 34.7°C | 6.4°C | 2 mm | 59% | 1.2 m/s | 8.4 |
| 2019 | 21.1°C | 14.7°C | 8.4°C | 28.4°C | 4.9°C | 33 mm | 73% | 1.6 m/s | 7 |
| 2018 | 25.3°C | 17.6°C | 9.8°C | 33.0°C | 5.5°C | 4 mm | 61% | 1.6 m/s | 7.9 |
| 2017 | 25.3°C | 17.4°C | 9.4°C | 34.3°C | 4.4°C | 15 mm | 59% | 1.3 m/s | 7.7 |
| 2016 | 24.4°C | 16.9°C | 9.4°C | 32.0°C | 6.6°C | 10 mm | 64% | 1.5 m/s | 7.6 |
| 2015 | 23.5°C | 16.3°C | 9.1°C | 33.5°C | 5.8°C | 31 mm | 63% | 1.5 m/s | 7.2 |
| 2014 | 27.9°C | 19.2°C | 10.5°C | 35.5°C | 4.4°C | 3 mm | 44% | 1.5 m/s | 8.1 |
| 2013 | 27.2°C | 18.5°C | 9.8°C | 36.7°C | 6.3°C | 9 mm | 52% | 1.4 m/s | 7.9 |
| 2012 | 27.6°C | 18.4°C | 9.2°C | 37.0°C | 6.0°C | 0 mm | 49% | 1.3 m/s | 8.3 |
| 2011 | 22.4°C | 14.7°C | 7.1°C | 31.7°C | 3.2°C | 12 mm | 60% | 1.6 m/s | 8 |
| 2010 | 23.1°C | 14.9°C | 6.7°C | 30.9°C | 2.7°C | 1 mm | 60% | 1.4 m/s | 8.2 |
| 2009 | 29.3°C | 20.3°C | 11.4°C | 35.6°C | 8.1°C | 0 mm | 50% | 1.1 m/s | 8 |
| 2008 | 24.6°C | 16.5°C | 8.5°C | 37.4°C | 3.6°C | 7 mm | 57% | 1.4 m/s | 7.8 |
| 2007 | 27.8°C | 18.5°C | 9.2°C | 33.0°C | 4.9°C | 0 mm | 45% | 1.2 m/s | 8.2 |
| 2006 | 27.7°C | 19.0°C | 10.2°C | 34.0°C | 5.2°C | 8 mm | 56% | 1.2 m/s | 8.1 |
| 2005 | 25.6°C | 17.7°C | 9.7°C | 34.0°C | 3.8°C | 6 mm | 63% | 1.3 m/s | 7.9 |
| 2004 | 27.6°C | 18.9°C | 10.2°C | 35.4°C | 4.9°C | 0 mm | 50% | 1.4 m/s | 8.3 |
| 2003 | 25.5°C | 17.5°C | 9.4°C | 38.4°C | 1.1°C | 16 mm | 58% | 1.3 m/s | 7.6 |
| 2002 | 26.5°C | 17.4°C | 8.2°C | 36.3°C | 3.3°C | 0 mm | 51% | 1.3 m/s | 8.2 |
| 2001 | 30.1°C | 20.8°C | 11.5°C | 37.1°C | 5.0°C | 1 mm | 50% | 1.1 m/s | 8 |
| 2000 | 27.5°C | 19.0°C | 10.6°C | 36.5°C | 5.8°C | 8 mm | 56% | 1.3 m/s | 8 |
| 1999 | 24.5°C | 15.9°C | 7.3°C | 30.9°C | 2.6°C | 2 mm | 60% | 1.3 m/s | 7.7 |
| 1998 ❄️ 🌧️ | 19.4°C | 13.2°C | 7.1°C | 25.3°C | 4.6°C | 58 mm | 75% | 1.6 m/s | 7.2 |
| 1997 🔥 | 30.8°C | 21.7°C | 12.6°C | 36.6°C | 8.1°C | 2 mm | 48% | 1.1 m/s | 7.9 |
| 1996 | 25.6°C | 17.3°C | 9.0°C | 34.3°C | 4.7°C | 2 mm | 58% | 1.3 m/s | 8.1 |
| 1995 | 20.3°C | 13.9°C | 7.5°C | 30.5°C | 4.1°C | 19 mm | 73% | 1.6 m/s | 6.9 |
| 1994 | 24.8°C | 16.4°C | 8.0°C | 31.4°C | 3.9°C | 5 mm | 62% | 1.3 m/s | 7.1 |
| 1993 | 25.2°C | 17.3°C | 9.3°C | 30.1°C | 5.5°C | 7 mm | 64% | 1.3 m/s | 7.8 |
| 1992 | 27.6°C | 19.0°C | 10.5°C | 32.3°C | 6.7°C | 14 mm | 62% | 1.1 m/s | 7.4 |
| 1991 | 22.6°C | 14.5°C | 6.4°C | 30.8°C | 2.8°C | 1 mm | 62% | 1.5 m/s | 7.6 |
| 1990 | 24.2°C | 16.0°C | 7.7°C | 33.1°C | 3.8°C | 14 mm | 58% | 1.6 m/s | 7.7 |
| 1989 | 26.2°C | 17.8°C | 9.3°C | 33.9°C | 6.0°C | 5 mm | 50% | 1.5 m/s | 7.6 |
| 1988 | 26.2°C | 17.4°C | 8.7°C | 34.1°C | 2.0°C | 5 mm | 49% | 1.4 m/s | 7.6 |
| 1987 | 26.9°C | 18.8°C | 10.7°C | 33.4°C | 6.4°C | 5 mm | 51% | 1.4 m/s | 7.2 |
| 1986 | 26.4°C | 17.3°C | 8.2°C | 33.4°C | 3.2°C | 1 mm | 51% | 1.3 m/s | 7.9 |
| 1985 | 25.9°C | 17.0°C | 8.1°C | 32.9°C | 4.6°C | 0 mm | 50% | 1.3 m/s | 7.8 |
| 1984 | 31.1°C | 21.3°C | 11.4°C | 37.9°C | 5.0°C | 1 mm | 36% | 1.2 m/s | 7.5 |
| 1983 | 24.4°C | 16.3°C | 8.1°C | 33.7°C | 2.8°C | 4 mm | 61% | 1.2 m/s | — |
| 1982 | 24.4°C | 16.3°C | 8.3°C | 31.9°C | 4.7°C | 8 mm | 61% | 1.3 m/s | — |
| 1981 | 25.6°C | 16.8°C | 8.0°C | 31.8°C | 4.0°C | 11 mm | 55% | 1.3 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 25.7°C with lows near 9.1°C (mean 17.4°C), based on 45 years of NASA POWER data.
May averages 8 mm of rainfall in Hemet, one of the drier months. The wettest on record was 58 mm in 1998.
The hottest May reached 38.4°C in 2003. The coldest dipped to 1.1°C in 2003.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.1°C — but days and nights have moved in opposite directions. Overnight lows rose from 8.8°C to 9.4°C while daytime highs eased from 26.3°C to 25.8°C, narrowing the gap between day and night.
May is close to Hemet's year-round average and one of the drier months, so plan for around 25.7°C daytime highs and 9.1°C at night.
Not quite — May is the 7th coolest month in Hemet, averaging 17.4°C.
For May in Hemet, pack light layers you can adjust through the day, with typical highs of 25.7°C and lows of 9.1°C.
Relative humidity in May averages 57% — moderately humid.
Average wind speed in May is 1.4 m/s. The windiest May on record averaged 1.6 m/s (1990).
The wettest May on record was 1998 with 58 mm. On average, May sees 8 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 Hemet 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.
