May is one of the warmer months of the year in Montgomery, with average highs near 27.7°C and lows around 16.2°C (mean 22°C). It is about average for rainfall, averaging 105 mm of rainfall and 76% relative humidity across the period.
May is one of the warmer months of the year in Montgomery. Across 45 years of records, the warmest May in Montgomery was 2000 — when the month averaged 25.2°C — while the coldest was 1997 at 19.7°C. Typical May days reach 27.7°C with nights near 16.2°C. The long-term trend is warming, about 0.3°C per decade.
May is about average for rainfall in Montgomery, averaging 105 mm of rainfall. The wettest May on record was 2025 with 236 mm, while the driest was 2007 at 6 mm.
Relative humidity in Montgomery during May averages 76%. The most humid May was 2009 at 86%, and the least humid was 2007 at 53%.
May receives about 6.2 kWh/m²/day of solar energy in Montgomery. The sunniest Mays were 2007 and 2019 at 6.8 kWh/m²/day, and the cloudiest were 1991 and 2009 at 5.
Average wind speed in Montgomery during May is 1.5 m/s. The windiest May was 2009 at 1.8 m/s, while the calmest was 1982 at 1.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 21.2°C | 21.6°C | 22.6°C | 22.2°C | 22.2°C | +1°C |
| Avg High | 27.2°C | 27.1°C | 28.7°C | 27.9°C | 27.8°C | +0.6°C |
| Avg Low | 15.2°C | 16.0°C | 16.4°C | 16.6°C | 16.7°C | +1.5°C |
| Avg Rain | 94 mm | 94 mm | 100 mm | 117 mm | 126 mm | +32 mm |
May temperatures in Montgomery have risen by about 1.6°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 4.7°C (2013) to a record high of 37.1°C (2000).
Rainfall in May is about average for rainfall, averaging 105 mm, with a wettest year of 236 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.
One of the best times to visit Montgomery
May is one of the best times to visit Montgomery. Expect days averaging 27.7°C and nights around 16.2°C (mean 22°C) — warmer than Montgomery's yearly average — with higher rainfall (105 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 🌧️ | 27.7°C | 22.7°C | 17.8°C | 32.0°C | 10.3°C | 236 mm | 81% | 1.4 m/s | 5.5 |
| 2024 | 28.5°C | 23.5°C | 18.5°C | 31.1°C | 13.4°C | 178 mm | 81% | 1.4 m/s | 5.9 |
| 2023 | 26.5°C | 21.1°C | 15.8°C | 31.2°C | 7.0°C | 114 mm | 80% | 1.4 m/s | 5.8 |
| 2022 | 29.5°C | 23.5°C | 17.6°C | 35.6°C | 11.0°C | 98 mm | 73% | 1.4 m/s | 6.5 |
| 2021 | 28.3°C | 21.9°C | 15.5°C | 34.8°C | 9.9°C | 76 mm | 70% | 1.7 m/s | 6.6 |
| 2020 | 26.5°C | 20.6°C | 14.7°C | 30.6°C | 6.3°C | 53 mm | 78% | 1.5 m/s | 6.7 |
| 2019 | 29.4°C | 23.7°C | 18.0°C | 34.6°C | 10.6°C | 97 mm | 77% | 1.3 m/s | 6.8 |
| 2018 | 29.8°C | 24.0°C | 18.2°C | 35.3°C | 11.2°C | 200 mm | 74% | 1.4 m/s | 6 |
| 2017 | 27.3°C | 21.6°C | 15.9°C | 33.1°C | 5.8°C | 184 mm | 76% | 1.5 m/s | 6.1 |
| 2016 | 26.5°C | 21.1°C | 15.7°C | 32.3°C | 6.9°C | 43 mm | 79% | 1.4 m/s | 6.4 |
| 2015 | 27.7°C | 22.5°C | 17.2°C | 30.5°C | 8.4°C | 121 mm | 78% | 1.3 m/s | 6.2 |
| 2014 | 26.4°C | 21.3°C | 16.2°C | 30.8°C | 8.2°C | 118 mm | 82% | 1.3 m/s | 6.4 |
| 2013 | 25.5°C | 20.0°C | 14.5°C | 30.3°C | 4.7°C | 61 mm | 80% | 1.6 m/s | 6.1 |
| 2012 | 28.6°C | 23.0°C | 17.3°C | 34.3°C | 11.7°C | 134 mm | 75% | 1.2 m/s | 6.3 |
| 2011 | 29.3°C | 22.1°C | 14.9°C | 36.5°C | 6.3°C | 50 mm | 68% | 1.5 m/s | 6.7 |
| 2010 | 28.3°C | 23.1°C | 17.9°C | 31.6°C | 9.5°C | 161 mm | 80% | 1.5 m/s | 6.1 |
| 2009 | 25.9°C | 21.6°C | 17.3°C | 30.3°C | 7.8°C | 216 mm | 86% | 1.8 m/s | 5 |
| 2008 | 27.6°C | 21.6°C | 15.6°C | 33.9°C | 9.5°C | 97 mm | 77% | 1.6 m/s | 6.3 |
| 2007 | 31.4°C | 24.0°C | 16.6°C | 35.1°C | 9.9°C | 6 mm | 53% | 1.6 m/s | 6.8 |
| 2006 | 28.3°C | 22.2°C | 16.0°C | 36.2°C | 8.8°C | 108 mm | 73% | 1.5 m/s | 6.5 |
| 2005 | 26.0°C | 20.3°C | 14.6°C | 30.1°C | 6.8°C | 90 mm | 78% | 1.3 m/s | 6.6 |
| 2004 | 30.4°C | 24.0°C | 17.7°C | 35.1°C | 6.3°C | 98 mm | 69% | 1.5 m/s | 6.2 |
| 2003 | 27.2°C | 22.4°C | 17.6°C | 30.4°C | 11.2°C | 194 mm | 85% | 1.6 m/s | 5.3 |
| 2002 | 30.3°C | 23.2°C | 16.0°C | 35.2°C | 6.9°C | 75 mm | 64% | 1.7 m/s | 6.2 |
| 2001 | 26.8°C | 21.1°C | 15.3°C | 30.2°C | 10.3°C | 85 mm | 77% | 1.4 m/s | 6.5 |
| 2000 🔥 | 32.6°C | 25.2°C | 17.7°C | 37.1°C | 12.0°C | 30 mm | 60% | 1.7 m/s | 6.5 |
| 1999 | 28.5°C | 22.0°C | 15.4°C | 32.1°C | 7.3°C | 104 mm | 70% | 1.4 m/s | 6.3 |
| 1998 | 29.3°C | 23.4°C | 17.5°C | 33.1°C | 10.9°C | 60 mm | 76% | 1.3 m/s | 6.7 |
| 1997 ❄️ | 24.9°C | 19.7°C | 14.6°C | 30.0°C | 6.7°C | 121 mm | 80% | 1.5 m/s | 5.9 |
| 1996 | 28.2°C | 22.6°C | 17.1°C | 32.4°C | 6.6°C | 95 mm | 79% | 1.2 m/s | 6.5 |
| 1995 | 28.5°C | 22.8°C | 17.2°C | 32.5°C | 8.4°C | 61 mm | 76% | 1.5 m/s | 6.1 |
| 1994 | 26.1°C | 20.5°C | 14.8°C | 29.7°C | 9.2°C | 54 mm | 78% | 1.4 m/s | 6.7 |
| 1993 | 26.0°C | 20.8°C | 15.5°C | 30.2°C | 8.4°C | 62 mm | 79% | 1.4 m/s | 5.8 |
| 1992 | 26.3°C | 20.2°C | 14.2°C | 30.2°C | 6.4°C | 48 mm | 74% | 1.5 m/s | 6.4 |
| 1991 | 27.1°C | 23.0°C | 19.0°C | 30.9°C | 10.7°C | 218 mm | 86% | 1.5 m/s | 5 |
| 1990 | 26.2°C | 20.5°C | 14.9°C | 30.2°C | 8.1°C | 115 mm | 80% | 1.5 m/s | 5.8 |
| 1989 | 26.2°C | 20.4°C | 14.7°C | 32.6°C | 7.1°C | 71 mm | 78% | 1.5 m/s | 5.7 |
| 1988 | 27.7°C | 20.7°C | 13.6°C | 33.9°C | 7.8°C | 38 mm | 65% | 1.4 m/s | 6.3 |
| 1987 | 27.4°C | 22.5°C | 17.6°C | 31.1°C | 12.2°C | 100 mm | 82% | 1.2 m/s | 5.7 |
| 1986 | 29.4°C | 22.7°C | 16.0°C | 35.2°C | 8.3°C | 130 mm | 66% | 1.4 m/s | 5.6 |
| 1985 | 27.9°C | 21.8°C | 15.7°C | 35.8°C | 9.0°C | 82 mm | 73% | 1.5 m/s | 6.1 |
| 1984 | 26.1°C | 20.2°C | 14.4°C | 29.9°C | 7.1°C | 135 mm | 80% | 1.5 m/s | 5.8 |
| 1983 | 25.7°C | 20.0°C | 14.4°C | 28.0°C | 8.8°C | 122 mm | 82% | 1.6 m/s | — |
| 1982 | 27.3°C | 22.0°C | 16.7°C | 30.9°C | 9.9°C | 87 mm | 77% | 1.1 m/s | — |
| 1981 | 27.5°C | 20.5°C | 13.6°C | 34.1°C | 6.4°C | 84 mm | 69% | 1.5 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 27.7°C with lows near 16.2°C (mean 22°C), based on 45 years of NASA POWER data.
May averages 105 mm of rainfall in Montgomery, about average for rainfall. The wettest on record was 236 mm in 2025.
The hottest May reached 37.1°C in 2000. The coldest dipped to 4.7°C in 2013.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.6°C. Daytime highs moved from 26.9°C to 28.1°C and overnight lows from 15°C to 17°C over the same span.
May is one of the warmer months of the year in Montgomery and about average for rainfall, so plan for around 27.7°C daytime highs and 16.2°C at night.
Not quite — May is the 8th coolest month in Montgomery, averaging 22°C.
For May in Montgomery, pack light layers you can adjust through the day, with typical highs of 27.7°C and lows of 16.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 76% — quite humid.
Average wind speed in May is 1.5 m/s. The windiest May on record averaged 1.8 m/s (2009).
The wettest May on record was 2025 with 236 mm. On average, May sees 105 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 Montgomery 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.
