May is one of the warmer months of the year in San Angelo, with average highs near 31.5°C and lows around 16.7°C (mean 24.1°C). It is a relatively wet time of year, averaging 78 mm of rainfall and 56% relative humidity across the period.
May is one of the warmer months of the year in San Angelo. Across 45 years of records, the warmest May in San Angelo was 2022 — when the month averaged 27.5°C — while the coldest was 1992 at 21.2°C. Typical May days reach 31.5°C with nights near 16.7°C. The long-term trend is warming, about 0.2°C per decade.
May is a relatively wet time of year in San Angelo, averaging 78 mm of rainfall. The wettest May on record was 2015 with 207 mm, while the driest was 2004 at 13 mm.
Relative humidity in San Angelo during May averages 56%. The most humid May was 2007 at 74%, and the least humid was 1998 at 37%.
May receives about 6.6 kWh/m²/day of solar energy in San Angelo. The sunniest Mays were 2000, 2006 and 2011 at 7.3 kWh/m²/day, and the cloudiest was 2007 at 5.3.
Average wind speed in San Angelo during May is 3.7 m/s. The windiest May was 1996 at 4.6 m/s, while the calmest were 1994 and 2023 at 2.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.4°C | 24.0°C | 24.7°C | 23.7°C | 25.0°C | +1.6°C |
| Avg High | 30.8°C | 31.5°C | 32.3°C | 31.0°C | 32.4°C | +1.6°C |
| Avg Low | 16.0°C | 16.4°C | 17.2°C | 16.3°C | 17.6°C | +1.6°C |
| Avg Rain | 89 mm | 71 mm | 54 mm | 99 mm | 80 mm | -9 mm |
May temperatures in San Angelo have risen by about 1.7°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 2.8°C (2013) to a record high of 43.8°C (2000).
Rainfall in May is a relatively wet time of year, averaging 78 mm, with a wettest year of 207 mm.
One of the best times to visit San Angelo
May is one of the best times to visit San Angelo. Expect days averaging 31.5°C and nights around 16.7°C (mean 24.1°C) — warmer than San Angelo's yearly average — with moderate rainfall (78 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 | 32.4°C | 24.7°C | 17.0°C | 39.2°C | 9.6°C | 81 mm | 51% | 3.2 m/s | 6.6 |
| 2024 | 34.0°C | 26.3°C | 18.6°C | 40.7°C | 12.8°C | 102 mm | 56% | 3.4 m/s | 6.3 |
| 2023 | 30.2°C | 23.8°C | 17.4°C | 38.5°C | 11.2°C | 113 mm | 66% | 2.9 m/s | 6.3 |
| 2022 🔥 | 35.9°C | 27.5°C | 19.1°C | 41.7°C | 11.9°C | 30 mm | 46% | 4.2 m/s | 7.2 |
| 2021 | 29.2°C | 22.7°C | 16.2°C | 35.1°C | 10.1°C | 98 mm | 68% | 3.7 m/s | 6.1 |
| 2020 | 32.6°C | 25.0°C | 17.4°C | 40.7°C | 10.1°C | 59 mm | 53% | 3.9 m/s | 7.2 |
| 2019 | 28.6°C | 22.3°C | 16.0°C | 35.4°C | 7.7°C | 113 mm | 70% | 3.7 m/s | 5.8 |
| 2018 | 34.2°C | 26.4°C | 18.6°C | 40.6°C | 12.8°C | 72 mm | 55% | 4 m/s | 7.2 |
| 2017 | 30.7°C | 23.0°C | 15.2°C | 39.0°C | 9.6°C | 55 mm | 53% | 3.8 m/s | 6.6 |
| 2016 | 28.6°C | 22.2°C | 15.8°C | 35.4°C | 7.4°C | 166 mm | 69% | 3.5 m/s | 6.3 |
| 2015 🌧️ | 28.7°C | 22.6°C | 16.6°C | 34.2°C | 11.1°C | 207 mm | 71% | 3.8 m/s | 5.8 |
| 2014 | 31.4°C | 23.5°C | 15.5°C | 39.3°C | 6.5°C | 119 mm | 49% | 3.9 m/s | 7.1 |
| 2013 | 30.7°C | 23.1°C | 15.6°C | 38.7°C | 2.8°C | 87 mm | 55% | 4 m/s | 6.8 |
| 2012 | 31.7°C | 24.4°C | 17.0°C | 39.3°C | 11.3°C | 105 mm | 59% | 3.6 m/s | 6.6 |
| 2011 | 33.6°C | 24.9°C | 16.3°C | 42.5°C | 5.3°C | 21 mm | 39% | 4.2 m/s | 7.3 |
| 2010 | 31.4°C | 24.1°C | 16.8°C | 38.4°C | 8.0°C | 43 mm | 57% | 3.7 m/s | 6.3 |
| 2009 | 31.4°C | 24.1°C | 16.8°C | 40.7°C | 10.8°C | 55 mm | 58% | 3.2 m/s | 6.5 |
| 2008 | 33.1°C | 25.0°C | 16.9°C | 39.5°C | 7.0°C | 38 mm | 46% | 4 m/s | 7 |
| 2007 | 27.3°C | 21.7°C | 16.1°C | 33.9°C | 11.1°C | 139 mm | 74% | 3.1 m/s | 5.3 |
| 2006 | 33.9°C | 25.9°C | 17.8°C | 39.6°C | 10.6°C | 29 mm | 47% | 4.1 m/s | 7.3 |
| 2005 | 29.3°C | 22.6°C | 15.8°C | 37.8°C | 8.0°C | 105 mm | 65% | 3.4 m/s | 5.9 |
| 2004 | 32.4°C | 24.7°C | 17.0°C | 38.1°C | 7.1°C | 13 mm | 56% | 4.2 m/s | 6.7 |
| 2003 | 34.0°C | 26.0°C | 17.9°C | 42.5°C | 13.2°C | 49 mm | 48% | 3.4 m/s | 6.5 |
| 2002 | 33.1°C | 25.2°C | 17.2°C | 39.4°C | 11.0°C | 29 mm | 48% | 4.4 m/s | 6.7 |
| 2001 | 32.4°C | 24.8°C | 17.2°C | 39.4°C | 9.9°C | 62 mm | 55% | 3.9 m/s | 6.9 |
| 2000 | 35.9°C | 27.4°C | 18.9°C | 43.8°C | 10.9°C | 24 mm | 46% | 4.5 m/s | 7.3 |
| 1999 | 32.0°C | 24.4°C | 16.7°C | 36.5°C | 8.8°C | 46 mm | 56% | 3.9 m/s | 6.7 |
| 1998 | 36.2°C | 27.3°C | 18.5°C | 40.8°C | 12.8°C | 42 mm | 37% | 3.7 m/s | 7.2 |
| 1997 | 29.0°C | 21.8°C | 14.6°C | 37.5°C | 7.9°C | 53 mm | 63% | 3.2 m/s | 6.7 |
| 1996 | 35.6°C | 27.4°C | 19.1°C | 40.7°C | 12.3°C | 44 mm | 48% | 4.6 m/s | 7 |
| 1995 | 31.2°C | 23.8°C | 16.4°C | 38.9°C | 11.0°C | 116 mm | 52% | 4 m/s | 6.1 |
| 1994 | 30.0°C | 23.1°C | 16.2°C | 37.2°C | 6.8°C | 117 mm | 67% | 2.9 m/s | 6.3 |
| 1993 | 30.7°C | 22.8°C | 14.9°C | 37.1°C | 7.5°C | 63 mm | 54% | 3.5 m/s | 7.1 |
| 1992 ❄️ | 27.1°C | 21.2°C | 15.2°C | 35.4°C | 9.1°C | 102 mm | 70% | 3.1 m/s | 5.8 |
| 1991 | 32.3°C | 24.9°C | 17.4°C | 37.4°C | 8.8°C | 50 mm | 56% | 3.8 m/s | 6.9 |
| 1990 | 31.3°C | 23.3°C | 15.3°C | 40.3°C | 6.5°C | 74 mm | 54% | 3.9 m/s | 6.8 |
| 1989 | 34.3°C | 26.2°C | 18.2°C | 42.2°C | 13.8°C | 47 mm | 48% | 4.2 m/s | 6.5 |
| 1988 | 30.0°C | 22.3°C | 14.5°C | 35.9°C | 8.5°C | 84 mm | 51% | 3.7 m/s | 6.8 |
| 1987 | 27.9°C | 21.9°C | 15.9°C | 31.8°C | 10.9°C | 163 mm | 70% | 3 m/s | 6.1 |
| 1986 | 30.9°C | 23.7°C | 16.5°C | 38.8°C | 10.6°C | 139 mm | 58% | 3.5 m/s | 6.3 |
| 1985 | 31.1°C | 23.7°C | 16.3°C | 40.2°C | 9.4°C | 85 mm | 58% | 3.2 m/s | 7.1 |
| 1984 | 33.2°C | 24.9°C | 16.5°C | 40.0°C | 9.8°C | 27 mm | 41% | 3.8 m/s | 6.9 |
| 1983 | 31.0°C | 23.1°C | 15.2°C | 36.5°C | 9.7°C | 33 mm | 47% | 3.7 m/s | — |
| 1982 | 29.1°C | 22.5°C | 15.9°C | 35.9°C | 6.8°C | 126 mm | 66% | 3.7 m/s | — |
| 1981 | 29.5°C | 22.4°C | 15.3°C | 38.0°C | 7.9°C | 100 mm | 61% | 3.4 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 31.5°C with lows near 16.7°C (mean 24.1°C), based on 45 years of NASA POWER data.
May averages 78 mm of rainfall in San Angelo, a relatively wet time of year. The wettest on record was 207 mm in 2015.
The hottest May reached 43.8°C in 2000. The coldest dipped to 2.8°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 30.8°C to 32.3°C and overnight lows from 15.8°C to 17.7°C over the same span.
May is one of the warmer months of the year in San Angelo and a relatively wet time of year, so plan for around 31.5°C daytime highs and 16.7°C at night.
Not quite — May is the 8th coolest month in San Angelo, averaging 24.1°C.
For May in San Angelo, pack light, breathable clothing and sun protection, with typical highs of 31.5°C and lows of 16.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 56% — moderately humid.
Average wind speed in May is 3.7 m/s. The windiest May on record averaged 4.6 m/s (1996).
The wettest May on record was 2015 with 207 mm. On average, May sees 78 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 San Angelo 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.
