May is one of the warmer months of the year in Tulsa, with average highs near 25.4°C and lows around 14.6°C (mean 20°C). It is a relatively wet time of year, averaging 155 mm of rainfall and 79% relative humidity across the period.
May is one of the warmer months of the year in Tulsa. Across 45 years of records, the warmest May in Tulsa was 2018 — when the month averaged 23.4°C — while the coldest was 1983 at 17.5°C. Typical May days reach 25.4°C with nights near 14.6°C. The long-term trend is warming, about 0.2°C per decade.
May is a relatively wet time of year in Tulsa, averaging 155 mm of rainfall. The wettest May on record was 2015 with 371 mm, while the driest was 2012 at 29 mm.
Relative humidity in Tulsa during May averages 79%. The most humid May was 1993 at 85%, and the least humid was 1996 at 69%.
May receives about 5.7 kWh/m²/day of solar energy in Tulsa. The sunniest May was 2012 at 6.9 kWh/m²/day, and the cloudiest was 1995 at 4.5.
Average wind speed in Tulsa during May is 2.5 m/s. The windiest May was 1996 at 3.5 m/s, while the calmest was 1994 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.6°C | 19.7°C | 20.3°C | 20.3°C | 20.1°C | +0.5°C |
| Avg High | 25.1°C | 25.1°C | 25.8°C | 25.6°C | 25.1°C | 0°C |
| Avg Low | 14.1°C | 14.4°C | 14.8°C | 15.0°C | 15.1°C | +1°C |
| Avg Rain | 144 mm | 146 mm | 137 mm | 176 mm | 177 mm | +33 mm |
May temperatures in Tulsa have risen by about 1.2°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 1.3°C (2013) to a record high of 35.4°C (2000).
Rainfall in May is a relatively wet time of year, averaging 155 mm, with a wettest year of 371 mm.
One of the best times to visit Tulsa
May is one of the best times to visit Tulsa. Expect days averaging 25.4°C and nights around 14.6°C (mean 20°C) — warmer than Tulsa's yearly average — with higher rainfall (155 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 | 24.9°C | 19.6°C | 14.4°C | 30.9°C | 7.7°C | 189 mm | 80% | 2.1 m/s | 5.8 |
| 2024 | 27.1°C | 21.9°C | 16.7°C | 30.8°C | 11.9°C | 163 mm | 79% | 2.1 m/s | 5.7 |
| 2023 | 25.9°C | 20.8°C | 15.7°C | 30.4°C | 3.5°C | 103 mm | 79% | 1.8 m/s | 5.8 |
| 2022 | 25.9°C | 20.7°C | 15.6°C | 30.7°C | 7.3°C | 263 mm | 81% | 2.9 m/s | 5 |
| 2021 | 23.3°C | 18.6°C | 14.0°C | 27.9°C | 6.5°C | 164 mm | 82% | 2.4 m/s | 4.6 |
| 2020 | 23.6°C | 18.8°C | 14.0°C | 29.1°C | 4.5°C | 182 mm | 83% | 2.4 m/s | 5.4 |
| 2019 | 25.2°C | 20.4°C | 15.6°C | 29.1°C | 6.5°C | 331 mm | 83% | 2.7 m/s | 5.4 |
| 2018 🔥 | 28.3°C | 23.4°C | 18.5°C | 31.7°C | 11.2°C | 117 mm | 80% | 2.2 m/s | 6.4 |
| 2017 | 25.1°C | 19.2°C | 13.3°C | 30.8°C | 4.9°C | 179 mm | 76% | 2.6 m/s | 6.6 |
| 2016 | 23.9°C | 19.0°C | 14.1°C | 28.9°C | 6.5°C | 120 mm | 80% | 2.3 m/s | 5.8 |
| 2015 🌧️ | 24.2°C | 19.4°C | 14.7°C | 28.3°C | 8.0°C | 371 mm | 84% | 2.6 m/s | 4.8 |
| 2014 | 26.8°C | 20.8°C | 14.7°C | 33.5°C | 3.7°C | 114 mm | 70% | 2.8 m/s | 6.1 |
| 2013 | 24.4°C | 19.1°C | 13.8°C | 29.3°C | 1.3°C | 168 mm | 80% | 2.8 m/s | 5.1 |
| 2012 | 28.4°C | 22.6°C | 16.8°C | 34.6°C | 10.8°C | 29 mm | 70% | 2.6 m/s | 6.9 |
| 2011 | 24.4°C | 19.1°C | 13.8°C | 30.6°C | 2.9°C | 182 mm | 79% | 3.4 m/s | 5.5 |
| 2010 | 25.7°C | 20.3°C | 14.8°C | 30.5°C | 6.0°C | 148 mm | 79% | 2.2 m/s | 5.8 |
| 2009 | 24.0°C | 18.8°C | 13.6°C | 29.8°C | 6.8°C | 172 mm | 81% | 2.2 m/s | 5.5 |
| 2008 | 25.3°C | 19.9°C | 14.6°C | 30.4°C | 5.2°C | 146 mm | 79% | 2.8 m/s | 6.2 |
| 2007 | 24.9°C | 20.5°C | 16.2°C | 29.0°C | 8.4°C | 154 mm | 84% | 2.2 m/s | 5.1 |
| 2006 | 26.7°C | 20.9°C | 15.1°C | 34.9°C | 7.6°C | 116 mm | 75% | 2.3 m/s | 6.2 |
| 2005 | 25.4°C | 19.8°C | 14.1°C | 33.9°C | 4.4°C | 77 mm | 74% | 2.2 m/s | 6.2 |
| 2004 | 26.8°C | 21.2°C | 15.7°C | 31.7°C | 3.2°C | 64 mm | 78% | 3 m/s | 5.8 |
| 2003 | 27.1°C | 20.8°C | 14.5°C | 33.5°C | 9.3°C | 145 mm | 73% | 2.4 m/s | 5.7 |
| 2002 | 24.1°C | 18.8°C | 13.5°C | 29.7°C | 7.2°C | 146 mm | 80% | 2.6 m/s | 5.3 |
| 2001 | 26.2°C | 20.7°C | 15.2°C | 30.7°C | 7.4°C | 191 mm | 76% | 2.6 m/s | 6 |
| 2000 | 27.0°C | 21.2°C | 15.5°C | 35.4°C | 7.2°C | 161 mm | 76% | 2.8 m/s | 5.8 |
| 1999 | 24.8°C | 19.2°C | 13.6°C | 28.8°C | 6.5°C | 216 mm | 80% | 2.5 m/s | 5.9 |
| 1998 | 27.4°C | 21.7°C | 16.1°C | 32.1°C | 7.3°C | 95 mm | 80% | 2.3 m/s | 6.4 |
| 1997 | 24.4°C | 18.3°C | 12.3°C | 30.1°C | 6.1°C | 82 mm | 75% | 2.4 m/s | 6.6 |
| 1996 | 29.3°C | 23.3°C | 17.2°C | 34.7°C | 8.1°C | 111 mm | 69% | 3.5 m/s | 5.7 |
| 1995 | 23.2°C | 18.3°C | 13.4°C | 29.1°C | 4.1°C | 211 mm | 83% | 2.5 m/s | 4.5 |
| 1994 | 24.9°C | 19.2°C | 13.5°C | 30.4°C | 1.6°C | 81 mm | 79% | 1.7 m/s | 6.4 |
| 1993 | 22.7°C | 18.1°C | 13.6°C | 26.6°C | 7.8°C | 203 mm | 85% | 2.5 m/s | 4.9 |
| 1992 | 23.5°C | 18.5°C | 13.5°C | 28.7°C | 4.9°C | 132 mm | 79% | 2.1 m/s | 5.4 |
| 1991 | 27.0°C | 22.3°C | 17.6°C | 31.6°C | 5.4°C | 116 mm | 82% | 2.4 m/s | 5.6 |
| 1990 | 23.6°C | 18.3°C | 13.1°C | 28.6°C | 5.4°C | 218 mm | 84% | 2.9 m/s | 5.2 |
| 1989 | 24.8°C | 19.4°C | 13.9°C | 30.9°C | 5.0°C | 152 mm | 78% | 2.7 m/s | 5.6 |
| 1988 | 25.8°C | 19.5°C | 13.2°C | 29.3°C | 8.6°C | 49 mm | 72% | 2.3 m/s | 6 |
| 1987 | 27.0°C | 22.4°C | 17.7°C | 31.6°C | 11.6°C | 168 mm | 81% | 2.2 m/s | 6.1 |
| 1986 | 24.6°C | 19.8°C | 14.9°C | 28.7°C | 8.1°C | 162 mm | 82% | 2.4 m/s | 5.5 |
| 1985 | 24.9°C | 19.5°C | 14.2°C | 31.2°C | 8.1°C | 92 mm | 81% | 2.5 m/s | 6.1 |
| 1984 | 25.0°C | 19.0°C | 13.0°C | 31.3°C | 4.4°C | 136 mm | 78% | 2.5 m/s | 5.1 |
| 1983 ❄️ | 23.4°C | 17.5°C | 11.7°C | 28.8°C | 5.9°C | 161 mm | 78% | 2.5 m/s | — |
| 1982 | 25.4°C | 20.4°C | 15.4°C | 30.1°C | 6.1°C | 203 mm | 80% | 2.5 m/s | — |
| 1981 | 25.0°C | 18.9°C | 12.8°C | 29.4°C | 4.3°C | 171 mm | 73% | 2.9 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 25.4°C with lows near 14.6°C (mean 20°C), based on 45 years of NASA POWER data.
May averages 155 mm of rainfall in Tulsa, a relatively wet time of year. The wettest on record was 371 mm in 2015.
The hottest May reached 35.4°C in 2000. The coldest dipped to 1.3°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 24.7°C to 25.4°C and overnight lows from 13.4°C to 15.3°C over the same span.
May is one of the warmer months of the year in Tulsa and a relatively wet time of year, so plan for around 25.4°C daytime highs and 14.6°C at night.
Not quite — May is the 8th coolest month in Tulsa, averaging 20°C.
For May in Tulsa, pack light layers you can adjust through the day, with typical highs of 25.4°C and lows of 14.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 79% — quite humid.
Average wind speed in May is 2.5 m/s. The windiest May on record averaged 3.5 m/s (1996).
The wettest May on record was 2015 with 371 mm. On average, May sees 155 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 Tulsa 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.
