May is one of the warmer months of the year in Roseville, with average highs near 24.9°C and lows around 10.7°C (mean 17.8°C). It is one of the drier months, averaging 29 mm of rainfall and 60% relative humidity across the period.
May is one of the warmer months of the year in Roseville. Across 45 years of records, the warmest May in Roseville was 2001 — when the month averaged 22.9°C — while the coldest was 1998 at 12.4°C. Typical May days reach 24.9°C with nights near 10.7°C. The long-term trend is warming, about 0.2°C per decade.
May is one of the drier months in Roseville, averaging 29 mm of rainfall. The wettest May on record was 1998 with 116 mm, while the driest were 1985 and 2001 at 1 mm.
Relative humidity in Roseville during May averages 60%. The most humid May was 1998 at 81%, and the least humid was 2021 at 38%.
May receives about 7.4 kWh/m²/day of solar energy in Roseville. The sunniest May was 2021 at 8.3 kWh/m²/day, and the cloudiest was 1998 at 6.1.
Average wind speed in Roseville during May is 1.5 m/s. The windiest May was 2015 at 2 m/s, while the calmest were 1982, 1986 and 1995 at 1.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 17.6°C | 17.0°C | 18.6°C | 17.2°C | 19.1°C | +1.5°C |
| Avg High | 24.9°C | 23.5°C | 25.8°C | 24.1°C | 26.7°C | +1.8°C |
| Avg Low | 10.4°C | 10.5°C | 11.4°C | 10.2°C | 11.4°C | +1°C |
| Avg Rain | 11 mm | 48 mm | 32 mm | 28 mm | 20 mm | +8 mm |
May temperatures in Roseville have risen by about 1.4°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 1.3°C (1988) to a record high of 40.6°C (2021).
Rainfall in May is one of the drier months, averaging 29 mm, with a wettest year of 116 mm.
A good time to visit Roseville
May is a good time to visit Roseville, with days averaging 24.9°C and nights around 10.7°C (mean 17.8°C, warmer than Roseville'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 | 27.2°C | 19.6°C | 11.9°C | 38.6°C | 7.9°C | 7 mm | 55% | 1.7 m/s | 8 |
| 2024 | 26.4°C | 18.8°C | 11.2°C | 33.6°C | 4.7°C | 31 mm | 57% | 1.7 m/s | 8 |
| 2023 | 22.3°C | 16.3°C | 10.3°C | 31.0°C | 5.6°C | 29 mm | 74% | 1.6 m/s | 7.1 |
| 2022 | 27.0°C | 18.9°C | 10.9°C | 36.9°C | 3.4°C | 5 mm | 47% | 1.7 m/s | 7.8 |
| 2021 | 30.0°C | 21.0°C | 12.0°C | 40.6°C | 6.3°C | 2 mm | 38% | 1.9 m/s | 8.3 |
| 2020 | 27.4°C | 19.8°C | 12.2°C | 39.5°C | 7.8°C | 44 mm | 52% | 1.6 m/s | 7.3 |
| 2019 | 20.7°C | 15.0°C | 9.4°C | 27.0°C | 5.6°C | 104 mm | 76% | 1.6 m/s | 6.9 |
| 2018 | 25.2°C | 18.0°C | 10.8°C | 34.2°C | 7.9°C | 12 mm | 62% | 1.8 m/s | 7.6 |
| 2017 | 23.8°C | 17.3°C | 10.7°C | 31.7°C | 5.7°C | 7 mm | 71% | 1.6 m/s | 7.8 |
| 2016 | 24.8°C | 18.2°C | 11.6°C | 35.4°C | 6.7°C | 21 mm | 63% | 1.5 m/s | 7.1 |
| 2015 | 25.0°C | 17.6°C | 10.2°C | 32.9°C | 7.3°C | 11 mm | 56% | 2 m/s | 7.5 |
| 2014 | 27.9°C | 20.0°C | 12.0°C | 35.0°C | 5.7°C | 7 mm | 46% | 1.7 m/s | 7.8 |
| 2013 | 27.6°C | 19.6°C | 11.7°C | 35.6°C | 6.5°C | 13 mm | 47% | 1.7 m/s | 7.7 |
| 2012 | 26.5°C | 18.6°C | 10.6°C | 34.8°C | 6.6°C | 3 mm | 53% | 1.6 m/s | 7.9 |
| 2011 | 19.5°C | 13.6°C | 7.8°C | 28.2°C | 3.6°C | 58 mm | 71% | 1.8 m/s | 6.9 |
| 2010 | 20.1°C | 13.8°C | 7.4°C | 27.3°C | 2.3°C | 46 mm | 69% | 1.6 m/s | 6.9 |
| 2009 | 27.3°C | 19.8°C | 12.3°C | 36.7°C | 9.1°C | 62 mm | 58% | 1.6 m/s | 7.4 |
| 2008 | 26.8°C | 19.0°C | 11.1°C | 38.5°C | 4.1°C | 8 mm | 50% | 1.8 m/s | 7.6 |
| 2007 | 28.0°C | 19.4°C | 10.7°C | 32.6°C | 4.4°C | 15 mm | 48% | 1.8 m/s | 7.9 |
| 2006 | 23.6°C | 17.6°C | 11.5°C | 29.4°C | 6.4°C | 21 mm | 72% | 1.3 m/s | 7.6 |
| 2005 | 22.6°C | 16.9°C | 11.1°C | 30.9°C | 6.6°C | 95 mm | 72% | 1.4 m/s | 6.7 |
| 2004 | 26.3°C | 18.8°C | 11.2°C | 33.2°C | 8.0°C | 7 mm | 54% | 1.7 m/s | 7.9 |
| 2003 | 23.1°C | 16.8°C | 10.6°C | 33.7°C | 5.7°C | 34 mm | 67% | 1.4 m/s | 7.3 |
| 2002 | 24.7°C | 17.3°C | 9.8°C | 34.9°C | 5.0°C | 32 mm | 58% | 1.5 m/s | 7.7 |
| 2001 🔥 | 31.6°C | 22.9°C | 14.2°C | 40.0°C | 7.0°C | 1 mm | 42% | 1.6 m/s | 8.1 |
| 2000 | 24.3°C | 17.7°C | 11.1°C | 35.2°C | 3.3°C | 46 mm | 64% | 1.3 m/s | 7 |
| 1999 | 24.5°C | 16.9°C | 9.4°C | 35.1°C | 3.9°C | 11 mm | 58% | 1.6 m/s | 7.9 |
| 1998 ❄️ 🌧️ | 16.8°C | 12.4°C | 7.9°C | 22.5°C | 3.8°C | 116 mm | 81% | 1.5 m/s | 6.1 |
| 1997 | 29.2°C | 21.5°C | 13.7°C | 35.9°C | 5.1°C | 14 mm | 51% | 1.3 m/s | 7.6 |
| 1996 | 22.7°C | 16.7°C | 10.6°C | 30.9°C | 6.4°C | 86 mm | 67% | 1.5 m/s | 7 |
| 1995 | 19.8°C | 14.8°C | 9.8°C | 26.8°C | 5.6°C | 54 mm | 79% | 1.2 m/s | 6.8 |
| 1994 | 25.0°C | 17.9°C | 10.9°C | 34.2°C | 6.7°C | 35 mm | 58% | 1.4 m/s | 6.6 |
| 1993 | 21.6°C | 15.9°C | 10.2°C | 27.3°C | 5.4°C | 52 mm | 74% | 1.3 m/s | 6.5 |
| 1992 | 29.3°C | 21.6°C | 13.8°C | 34.4°C | 9.8°C | 2 mm | 54% | 1.4 m/s | 7.6 |
| 1991 | 22.0°C | 15.3°C | 8.5°C | 29.3°C | 4.0°C | 26 mm | 61% | 1.4 m/s | 6.7 |
| 1990 | 24.4°C | 17.3°C | 10.2°C | 33.6°C | 5.7°C | 85 mm | 56% | 1.8 m/s | 6.8 |
| 1989 | 24.7°C | 17.5°C | 10.3°C | 31.2°C | 5.6°C | 8 mm | 57% | 1.5 m/s | 7.3 |
| 1988 | 24.3°C | 16.8°C | 9.4°C | 33.5°C | 1.3°C | 31 mm | 53% | 1.6 m/s | 6.7 |
| 1987 | 28.3°C | 20.6°C | 12.8°C | 36.1°C | 6.2°C | 7 mm | 49% | 1.5 m/s | 7.3 |
| 1986 | 22.7°C | 16.1°C | 9.5°C | 30.2°C | 2.5°C | 16 mm | 69% | 1.2 m/s | 7 |
| 1985 | 25.6°C | 17.5°C | 9.3°C | 32.9°C | 5.8°C | 1 mm | 49% | 1.7 m/s | 7.6 |
| 1984 | 26.4°C | 19.0°C | 11.7°C | 38.1°C | 5.0°C | 7 mm | 55% | 1.3 m/s | 7.4 |
| 1983 | 22.2°C | 15.8°C | 9.5°C | 33.0°C | 2.3°C | 14 mm | 74% | 1.3 m/s | — |
| 1982 | 23.7°C | 17.0°C | 10.4°C | 34.9°C | 5.8°C | 2 mm | 68% | 1.2 m/s | — |
| 1981 | 25.9°C | 18.4°C | 10.9°C | 33.7°C | 4.4°C | 18 mm | 53% | 1.3 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 24.9°C with lows near 10.7°C (mean 17.8°C), based on 45 years of NASA POWER data.
May averages 29 mm of rainfall in Roseville, one of the drier months. The wettest on record was 116 mm in 1998.
The hottest May reached 40.6°C in 2021. The coldest dipped to 1.3°C in 1988.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.4°C. Daytime highs moved from 24.8°C to 26.6°C and overnight lows from 10.4°C to 11.3°C over the same span.
May is one of the warmer months of the year in Roseville and one of the drier months, so plan for around 24.9°C daytime highs and 10.7°C at night.
Not quite — May is the 7th coolest month in Roseville, averaging 17.8°C.
For May in Roseville, pack light layers you can adjust through the day, with typical highs of 24.9°C and lows of 10.7°C.
Relative humidity in May averages 60% — moderately humid.
Average wind speed in May is 1.5 m/s. The windiest May on record averaged 2 m/s (2015).
The wettest May on record was 1998 with 116 mm. On average, May sees 29 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 Roseville 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.
