May is one of the warmer months of the year in Mission, with average highs near 34.8°C and lows around 22.4°C (mean 28.6°C). It is a relatively wet time of year, averaging 72 mm of rainfall and 67% relative humidity across the period.
May is one of the warmer months of the year in Mission. Across 45 years of records, the warmest May in Mission was 2024 — when the month averaged 32.1°C — while the coldest was 1992 at 26°C. Typical May days reach 34.8°C with nights near 22.4°C. The long-term trend is warming, about 0.3°C per decade.
May is a relatively wet time of year in Mission, averaging 72 mm of rainfall. The wettest May on record was 2021 with 200 mm, while the driest was 1998 at 0 mm.
Relative humidity in Mission during May averages 67%. The most humid May was 2015 at 77%, and the least humid was 1998 at 58%.
May receives about 6.1 kWh/m²/day of solar energy in Mission. The sunniest Mays were 1998 and 2018 at 6.9 kWh/m²/day, and the cloudiest was 2015 at 5.2.
Average wind speed in Mission during May is 3.8 m/s. The windiest May was 1996 at 4.8 m/s, while the calmest was 2023 at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 27.8°C | 28.6°C | 29.0°C | 28.6°C | 29.1°C | +1.3°C |
| Avg High | 34.0°C | 35.0°C | 35.4°C | 34.7°C | 34.9°C | +0.9°C |
| Avg Low | 21.7°C | 22.2°C | 22.6°C | 22.4°C | 23.5°C | +1.8°C |
| Avg Rain | 92 mm | 67 mm | 45 mm | 64 mm | 108 mm | +17 mm |
May temperatures in Mission have risen by about 1.7°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 10.6°C (2013) to a record high of 45.1°C (1998).
Rainfall in May is a relatively wet time of year, averaging 72 mm, with a wettest year of 200 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
A good time to visit Mission
May is a good time to visit Mission, with days averaging 34.8°C and nights around 22.4°C (mean 28.6°C, warmer than Mission's yearly average) and moderate rainfall. March and November 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 | 35.2°C | 29.4°C | 23.6°C | 40.4°C | 17.1°C | 103 mm | 70% | 3.5 m/s | 5.9 |
| 2024 🔥 | 38.5°C | 32.1°C | 25.7°C | 44.1°C | 22.2°C | 25 mm | 67% | 3.6 m/s | 5.6 |
| 2023 | 32.6°C | 27.5°C | 22.5°C | 35.9°C | 17.0°C | 94 mm | 74% | 2.6 m/s | 5.6 |
| 2022 | 35.9°C | 29.7°C | 23.5°C | 41.9°C | 21.1°C | 88 mm | 69% | 4.2 m/s | 6.6 |
| 2021 🌧️ | 32.8°C | 27.5°C | 22.3°C | 40.7°C | 17.2°C | 200 mm | 75% | 3.6 m/s | 6 |
| 2020 | 34.2°C | 28.6°C | 23.1°C | 38.4°C | 18.1°C | 141 mm | 70% | 3.7 m/s | 6 |
| 2019 | 35.5°C | 29.7°C | 24.0°C | 40.2°C | 18.3°C | 26 mm | 69% | 4.1 m/s | 5.6 |
| 2018 | 36.6°C | 29.6°C | 22.7°C | 39.5°C | 18.0°C | 20 mm | 61% | 3.8 m/s | 6.9 |
| 2017 | 35.5°C | 29.0°C | 22.5°C | 40.2°C | 15.9°C | 82 mm | 62% | 3.9 m/s | 6 |
| 2016 | 33.9°C | 28.4°C | 22.9°C | 39.0°C | 17.2°C | 95 mm | 69% | 3.4 m/s | 5.3 |
| 2015 | 32.2°C | 27.7°C | 23.2°C | 37.2°C | 14.5°C | 169 mm | 77% | 4 m/s | 5.2 |
| 2014 | 32.7°C | 26.5°C | 20.3°C | 37.0°C | 13.1°C | 70 mm | 65% | 4.1 m/s | 6.3 |
| 2013 | 33.9°C | 27.6°C | 21.3°C | 39.2°C | 10.6°C | 63 mm | 65% | 4.2 m/s | 5.7 |
| 2012 | 35.6°C | 29.0°C | 22.4°C | 40.3°C | 18.4°C | 48 mm | 64% | 3.8 m/s | 6.7 |
| 2011 | 36.8°C | 29.8°C | 22.9°C | 43.2°C | 16.2°C | 5 mm | 59% | 4.7 m/s | 6.1 |
| 2010 | 34.7°C | 28.5°C | 22.2°C | 37.2°C | 15.2°C | 61 mm | 66% | 4.1 m/s | 6.4 |
| 2009 | 35.3°C | 28.9°C | 22.5°C | 41.4°C | 16.8°C | 61 mm | 64% | 3.8 m/s | 6.3 |
| 2008 | 36.4°C | 29.7°C | 23.0°C | 41.9°C | 17.6°C | 33 mm | 62% | 3.8 m/s | 6.3 |
| 2007 | 32.9°C | 27.4°C | 22.0°C | 37.8°C | 17.9°C | 75 mm | 70% | 3.6 m/s | 5.6 |
| 2006 | 36.2°C | 29.5°C | 22.8°C | 43.3°C | 17.4°C | 35 mm | 60% | 3.9 m/s | 6.5 |
| 2005 | 34.6°C | 28.2°C | 21.9°C | 39.5°C | 15.2°C | 39 mm | 64% | 3.7 m/s | 5.8 |
| 2004 | 32.7°C | 27.0°C | 21.2°C | 41.9°C | 11.6°C | 63 mm | 72% | 4.1 m/s | 6.1 |
| 2003 | 37.5°C | 30.6°C | 23.8°C | 42.7°C | 21.5°C | 27 mm | 64% | 4 m/s | 6.1 |
| 2002 | 36.2°C | 29.6°C | 23.0°C | 43.6°C | 16.7°C | 37 mm | 61% | 4.5 m/s | 6.8 |
| 2001 | 35.8°C | 28.8°C | 21.9°C | 41.4°C | 19.0°C | 25 mm | 63% | 3.9 m/s | 6.7 |
| 2000 | 36.4°C | 29.9°C | 23.5°C | 40.2°C | 20.6°C | 57 mm | 66% | 4.4 m/s | 6.4 |
| 1999 | 36.8°C | 29.8°C | 22.9°C | 41.5°C | 19.6°C | 33 mm | 63% | 4 m/s | 6.7 |
| 1998 | 39.7°C | 31.1°C | 22.5°C | 45.1°C | 18.1°C | 0 mm | 58% | 4.1 m/s | 6.9 |
| 1997 | 31.9°C | 26.3°C | 20.8°C | 37.2°C | 16.5°C | 104 mm | 75% | 2.8 m/s | 6 |
| 1996 | 36.3°C | 29.7°C | 23.0°C | 41.8°C | 15.8°C | 22 mm | 64% | 4.8 m/s | 6.7 |
| 1995 | 36.9°C | 30.2°C | 23.5°C | 44.4°C | 19.6°C | 76 mm | 63% | 4.2 m/s | 6 |
| 1994 | 35.0°C | 28.7°C | 22.4°C | 39.6°C | 16.1°C | 38 mm | 66% | 3.4 m/s | 6.2 |
| 1993 | 33.1°C | 26.8°C | 20.6°C | 37.0°C | 15.1°C | 83 mm | 68% | 3.3 m/s | 5.8 |
| 1992 ❄️ | 31.4°C | 26.0°C | 20.6°C | 37.7°C | 14.2°C | 133 mm | 74% | 3.2 m/s | 5.5 |
| 1991 | 34.3°C | 28.5°C | 22.8°C | 38.0°C | 18.4°C | 141 mm | 72% | 3.4 m/s | 5.9 |
| 1990 | 35.0°C | 28.8°C | 22.6°C | 40.0°C | 14.6°C | 44 mm | 67% | 4 m/s | 5.9 |
| 1989 | 37.5°C | 30.2°C | 23.0°C | 40.9°C | 17.9°C | 7 mm | 62% | 4.4 m/s | 6.7 |
| 1988 | 33.9°C | 27.4°C | 20.9°C | 39.0°C | 17.8°C | 40 mm | 64% | 3.4 m/s | 5.8 |
| 1987 | 33.2°C | 27.4°C | 21.7°C | 38.3°C | 17.7°C | 117 mm | 72% | 3.4 m/s | 5.8 |
| 1986 | 33.7°C | 27.8°C | 21.8°C | 37.4°C | 16.6°C | 78 mm | 68% | 3.4 m/s | 5.5 |
| 1985 | 33.2°C | 27.3°C | 21.5°C | 38.1°C | 17.0°C | 153 mm | 71% | 3.1 m/s | 6.3 |
| 1984 | 34.2°C | 27.7°C | 21.2°C | 42.9°C | 14.9°C | 65 mm | 64% | 3.6 m/s | 6 |
| 1983 | 35.2°C | 28.5°C | 21.9°C | 43.5°C | 15.6°C | 51 mm | 65% | 4 m/s | — |
| 1982 | 31.6°C | 26.6°C | 21.6°C | 37.5°C | 16.1°C | 175 mm | 75% | 3.7 m/s | — |
| 1981 | 33.2°C | 27.4°C | 21.6°C | 40.9°C | 17.0°C | 137 mm | 70% | 3.3 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 34.8°C with lows near 22.4°C (mean 28.6°C), based on 45 years of NASA POWER data.
May averages 72 mm of rainfall in Mission, a relatively wet time of year. The wettest on record was 200 mm in 2021.
The hottest May reached 45.1°C in 1998. The coldest dipped to 10.6°C in 2013.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.7°C. Daytime highs moved from 33.5°C to 35°C and overnight lows from 21.6°C to 23.5°C over the same span.
May is one of the warmer months of the year in Mission and a relatively wet time of year, so plan for around 34.8°C daytime highs and 22.4°C at night.
Not quite — May is the 9th coolest month in Mission, averaging 28.6°C.
For May in Mission, pack light, breathable clothing and sun protection, with typical highs of 34.8°C and lows of 22.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 67% — moderately humid.
Average wind speed in May is 3.8 m/s. The windiest May on record averaged 4.8 m/s (1996).
The wettest May on record was 2021 with 200 mm. On average, May sees 72 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 Mission 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.
