May is one of the warmer months of the year in Owasso, with average highs near 25°C and lows around 14.4°C (mean 19.7°C). It is a relatively wet time of year, averaging 156 mm of rainfall and 78% relative humidity across the period.
May is one of the warmer months of the year in Owasso. Across 45 years of records, the warmest May in Owasso was 2018 — when the month averaged 23.6°C — while the coldest was 1983 at 17.2°C. Typical May days reach 25°C with nights near 14.4°C. The long-term trend is warming, about 0.2°C per decade.
May is a relatively wet time of year in Owasso, averaging 156 mm of rainfall. The wettest May on record was 2019 with 414 mm, while the driest was 2012 at 41 mm.
Relative humidity in Owasso during May averages 78%. The most humid May was 1993 at 84%, and the least humid was 2014 at 68%.
May receives about 5.7 kWh/m²/day of solar energy in Owasso. The sunniest May was 2012 at 6.9 kWh/m²/day, and the cloudiest was 1995 at 4.5.
Average wind speed in Owasso during May is 3.1 m/s. The windiest May was 1996 at 4.3 m/s, while the calmest was 1994 at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.3°C | 19.4°C | 19.9°C | 20.1°C | 19.8°C | +0.5°C |
| Avg High | 24.7°C | 24.7°C | 25.2°C | 25.4°C | 24.9°C | +0.2°C |
| Avg Low | 13.9°C | 14.1°C | 14.5°C | 14.8°C | 14.7°C | +0.8°C |
| Avg Rain | 134 mm | 147 mm | 149 mm | 182 mm | 169 mm | +34 mm |
May temperatures in Owasso have risen by about 1.4°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 1.1°C (1994) to a record high of 35.6°C (1996).
Rainfall in May is a relatively wet time of year, averaging 156 mm, with a wettest year of 414 mm.
One of the best times to visit Owasso
May is one of the best times to visit Owasso. Expect days averaging 25°C and nights around 14.4°C (mean 19.7°C) — warmer than Owasso's yearly average — with higher rainfall (156 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 | 24.6°C | 19.3°C | 14.0°C | 30.6°C | 7.7°C | 154 mm | 79% | 2.6 m/s | 5.8 |
| 2024 | 26.8°C | 21.5°C | 16.2°C | 30.2°C | 11.2°C | 174 mm | 78% | 2.7 m/s | 5.7 |
| 2023 | 26.1°C | 20.8°C | 15.6°C | 31.1°C | 3.3°C | 96 mm | 77% | 2.2 m/s | 5.8 |
| 2022 | 25.7°C | 20.4°C | 15.2°C | 31.5°C | 7.1°C | 243 mm | 80% | 3.6 m/s | 5 |
| 2021 | 22.8°C | 18.3°C | 13.7°C | 27.3°C | 6.0°C | 165 mm | 81% | 3 m/s | 4.6 |
| 2020 | 23.1°C | 18.4°C | 13.6°C | 28.7°C | 4.5°C | 180 mm | 83% | 2.9 m/s | 5.4 |
| 2019 🌧️ | 24.7°C | 19.9°C | 15.1°C | 28.9°C | 6.0°C | 414 mm | 83% | 3.3 m/s | 5.4 |
| 2018 🔥 | 28.7°C | 23.6°C | 18.5°C | 32.6°C | 11.7°C | 110 mm | 77% | 2.7 m/s | 6.4 |
| 2017 | 24.8°C | 19.0°C | 13.1°C | 30.4°C | 4.8°C | 184 mm | 76% | 3.1 m/s | 6.6 |
| 2016 | 23.7°C | 18.7°C | 13.8°C | 28.6°C | 6.8°C | 136 mm | 79% | 2.8 m/s | 5.8 |
| 2015 | 23.9°C | 19.1°C | 14.4°C | 27.4°C | 6.8°C | 314 mm | 82% | 3.1 m/s | 4.8 |
| 2014 | 27.1°C | 20.9°C | 14.7°C | 34.1°C | 3.5°C | 97 mm | 68% | 3.5 m/s | 6.1 |
| 2013 | 24.2°C | 19.0°C | 13.7°C | 29.5°C | 1.2°C | 190 mm | 79% | 3.4 m/s | 5.1 |
| 2012 | 27.5°C | 22.0°C | 16.6°C | 33.0°C | 10.6°C | 41 mm | 72% | 3.2 m/s | 6.9 |
| 2011 | 24.2°C | 19.0°C | 13.8°C | 30.8°C | 3.0°C | 188 mm | 78% | 4.1 m/s | 5.5 |
| 2010 | 25.3°C | 19.9°C | 14.4°C | 30.3°C | 5.4°C | 145 mm | 79% | 2.8 m/s | 5.8 |
| 2009 | 23.5°C | 18.4°C | 13.3°C | 29.7°C | 6.4°C | 163 mm | 81% | 2.8 m/s | 5.5 |
| 2008 | 25.0°C | 19.6°C | 14.3°C | 29.9°C | 4.8°C | 191 mm | 79% | 3.4 m/s | 6.2 |
| 2007 | 24.7°C | 20.3°C | 15.9°C | 29.2°C | 8.9°C | 172 mm | 83% | 2.6 m/s | 5.1 |
| 2006 | 25.8°C | 20.3°C | 14.9°C | 33.4°C | 6.8°C | 112 mm | 76% | 2.9 m/s | 6.2 |
| 2005 | 25.0°C | 19.5°C | 13.9°C | 31.6°C | 3.9°C | 91 mm | 75% | 2.7 m/s | 6.2 |
| 2004 | 26.1°C | 20.7°C | 15.3°C | 29.9°C | 2.6°C | 83 mm | 79% | 3.8 m/s | 5.8 |
| 2003 | 26.2°C | 20.1°C | 13.9°C | 31.9°C | 8.8°C | 161 mm | 74% | 2.9 m/s | 5.7 |
| 2002 | 23.7°C | 18.5°C | 13.2°C | 29.6°C | 7.0°C | 188 mm | 79% | 3.2 m/s | 5.3 |
| 2001 | 25.9°C | 20.5°C | 15.2°C | 30.8°C | 7.1°C | 152 mm | 75% | 3.2 m/s | 6 |
| 2000 | 26.2°C | 20.8°C | 15.4°C | 33.4°C | 7.7°C | 180 mm | 77% | 3.4 m/s | 5.8 |
| 1999 | 24.3°C | 18.8°C | 13.4°C | 28.2°C | 6.0°C | 228 mm | 80% | 3 m/s | 5.9 |
| 1998 | 27.1°C | 21.5°C | 15.8°C | 31.9°C | 6.9°C | 95 mm | 80% | 2.8 m/s | 6.4 |
| 1997 | 24.2°C | 18.0°C | 11.9°C | 30.0°C | 6.0°C | 109 mm | 74% | 3 m/s | 6.6 |
| 1996 | 29.1°C | 23.0°C | 17.0°C | 35.6°C | 9.4°C | 105 mm | 69% | 4.3 m/s | 5.7 |
| 1995 | 22.6°C | 17.8°C | 12.9°C | 28.5°C | 3.3°C | 229 mm | 83% | 3 m/s | 4.5 |
| 1994 | 24.4°C | 18.8°C | 13.2°C | 29.7°C | 1.1°C | 68 mm | 79% | 2.1 m/s | 6.4 |
| 1993 | 22.4°C | 17.9°C | 13.4°C | 26.6°C | 7.4°C | 229 mm | 84% | 3.1 m/s | 4.9 |
| 1992 | 23.2°C | 18.1°C | 13.0°C | 29.0°C | 4.5°C | 103 mm | 78% | 2.6 m/s | 5.4 |
| 1991 | 26.7°C | 22.0°C | 17.3°C | 31.5°C | 5.4°C | 111 mm | 81% | 2.9 m/s | 5.6 |
| 1990 | 23.2°C | 17.9°C | 12.7°C | 28.4°C | 5.3°C | 197 mm | 83% | 3.5 m/s | 5.2 |
| 1989 | 24.7°C | 19.2°C | 13.7°C | 30.6°C | 4.2°C | 122 mm | 76% | 3.3 m/s | 5.6 |
| 1988 | 25.3°C | 19.3°C | 13.4°C | 29.0°C | 8.4°C | 44 mm | 73% | 2.9 m/s | 6 |
| 1987 | 26.5°C | 22.0°C | 17.4°C | 31.0°C | 10.9°C | 173 mm | 82% | 2.8 m/s | 6.1 |
| 1986 | 24.4°C | 19.7°C | 15.0°C | 28.4°C | 7.9°C | 129 mm | 81% | 2.9 m/s | 5.5 |
| 1985 | 24.4°C | 19.2°C | 14.0°C | 30.7°C | 7.7°C | 99 mm | 82% | 3 m/s | 6.1 |
| 1984 | 24.3°C | 18.4°C | 12.6°C | 29.5°C | 3.4°C | 126 mm | 78% | 3 m/s | 5.1 |
| 1983 ❄️ | 23.0°C | 17.2°C | 11.4°C | 29.0°C | 5.9°C | 153 mm | 77% | 3.1 m/s | — |
| 1982 | 25.0°C | 20.1°C | 15.2°C | 29.7°C | 5.5°C | 210 mm | 79% | 3.1 m/s | — |
| 1981 | 24.7°C | 18.6°C | 12.6°C | 29.2°C | 4.1°C | 155 mm | 73% | 3.5 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 25°C with lows near 14.4°C (mean 19.7°C), based on 45 years of NASA POWER data.
May averages 156 mm of rainfall in Owasso, a relatively wet time of year. The wettest on record was 414 mm in 2019.
The hottest May reached 35.6°C in 1996. The coldest dipped to 1.1°C in 1994.
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 24.3°C to 25.2°C and overnight lows from 13.2°C to 14.9°C over the same span.
May is one of the warmer months of the year in Owasso and a relatively wet time of year, so plan for around 25°C daytime highs and 14.4°C at night.
Not quite — May is the 8th coolest month in Owasso, averaging 19.7°C.
For May in Owasso, pack light layers you can adjust through the day, with typical highs of 25°C and lows of 14.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 78% — quite humid.
Average wind speed in May is 3.1 m/s. The windiest May on record averaged 4.3 m/s (1996).
The wettest May on record was 2019 with 414 mm. On average, May sees 156 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 Owasso 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.
