May is one of the warmer months of the year in As Sulayyil, with average highs near 40.3°C and lows around 24.7°C (mean 32.5°C). It is about average for rainfall, averaging 3 mm of rainfall and 17% relative humidity across the period.
May is one of the warmer months of the year in As Sulayyil. Across 45 years of records, the warmest May in As Sulayyil was 2025 — when the month averaged 33.7°C — while the coldest was 1982 at 31°C. Typical May days reach 40.3°C with nights near 24.7°C. The long-term trend is warming, about 0.3°C per decade.
May is about average for rainfall in As Sulayyil, averaging 3 mm of rainfall. The wettest May on record was 2013 with 34 mm, while the driest were 2021, 2022 and 2025, among others at 0 mm.
Relative humidity in As Sulayyil during May averages 17%. The most humid May was 2013 at 26%, and the least humid was 2004 at 11%.
May receives about 7.6 kWh/m²/day of solar energy in As Sulayyil. The sunniest Mays were 1999 and 2002 at 8.1 kWh/m²/day, and the cloudiest were 1984 and 1987 at 6.9.
Average wind speed in As Sulayyil during May is 2.9 m/s. The windiest May was 1994 at 3.4 m/s, while the calmest was 1985 at 2.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 31.7°C | 32.3°C | 32.9°C | 32.7°C | 33.0°C | +1.3°C |
| Avg High | 39.5°C | 40.0°C | 41.1°C | 40.3°C | 40.8°C | +1.3°C |
| Avg Low | 23.9°C | 24.5°C | 24.8°C | 25.1°C | 25.2°C | +1.3°C |
| Avg Rain | 4 mm | 5 mm | 0 mm | 4 mm | 2 mm | -2 mm |
May temperatures in As Sulayyil have risen by about 1.3°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 18.9°C (2005) to a record high of 45.2°C (2025).
Rainfall in May is about average for rainfall, averaging 3 mm, with a wettest year of 34 mm.
A good time to visit As Sulayyil
May is a good time to visit As Sulayyil, with days averaging 40.3°C and nights around 24.7°C (mean 32.5°C, warmer than As Sulayyil's yearly average) and low rainfall. November and February 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 🔥 | 41.9°C | 33.7°C | 25.5°C | 45.2°C | 22.6°C | 0 mm | 12% | 2.9 m/s | 7.7 |
| 2024 | 40.9°C | 33.2°C | 25.5°C | 44.6°C | 22.2°C | 8 mm | 21% | 2.7 m/s | 7.5 |
| 2023 | 39.3°C | 32.3°C | 25.3°C | 42.7°C | 21.6°C | 1 mm | 23% | 2.9 m/s | 7.2 |
| 2022 | 40.9°C | 32.6°C | 24.2°C | 43.2°C | 19.8°C | 0 mm | 12% | 2.8 m/s | 7.5 |
| 2021 | 41.2°C | 33.2°C | 25.1°C | 43.6°C | 22.2°C | 0 mm | 13% | 2.6 m/s | 7.7 |
| 2020 | 40.4°C | 33.0°C | 25.6°C | 42.9°C | 23.3°C | 3 mm | 19% | 2.9 m/s | 7.4 |
| 2019 | 39.4°C | 32.3°C | 25.2°C | 42.1°C | 22.7°C | 2 mm | 22% | 3 m/s | 7.1 |
| 2018 | 40.1°C | 32.4°C | 24.6°C | 42.0°C | 22.1°C | 0 mm | 18% | 3.2 m/s | 7.7 |
| 2017 | 40.6°C | 33.5°C | 26.3°C | 43.4°C | 23.3°C | 0 mm | 19% | 2.8 m/s | 7.3 |
| 2016 | 40.6°C | 32.9°C | 25.1°C | 43.6°C | 23.2°C | 0 mm | 17% | 2.6 m/s | 7.5 |
| 2015 | 40.9°C | 33.4°C | 25.9°C | 43.3°C | 20.9°C | 2 mm | 18% | 2.9 m/s | 7.6 |
| 2014 | 40.3°C | 32.5°C | 24.8°C | 43.5°C | 20.7°C | 0 mm | 14% | 3.1 m/s | 7.7 |
| 2013 🌧️ | 38.7°C | 31.3°C | 23.8°C | 42.0°C | 20.7°C | 34 mm | 26% | 2.3 m/s | 7.2 |
| 2012 | 41.1°C | 32.7°C | 24.3°C | 43.4°C | 19.0°C | 0 mm | 15% | 3 m/s | 7.7 |
| 2011 | 40.3°C | 32.7°C | 25.0°C | 42.5°C | 22.0°C | 0 mm | 17% | 2.9 m/s | 7.5 |
| 2010 | 40.7°C | 33.2°C | 25.6°C | 43.6°C | 23.0°C | 1 mm | 18% | 3 m/s | 7.6 |
| 2009 | 41.4°C | 32.9°C | 24.3°C | 44.3°C | 20.7°C | 0 mm | 12% | 3.2 m/s | 7.9 |
| 2008 | 41.0°C | 33.5°C | 25.9°C | 42.9°C | 21.8°C | 0 mm | 17% | 2.9 m/s | 7.4 |
| 2007 | 40.9°C | 33.2°C | 25.5°C | 43.8°C | 21.1°C | 0 mm | 17% | 3 m/s | 7.6 |
| 2006 | 41.2°C | 33.6°C | 25.9°C | 43.3°C | 22.6°C | 0 mm | 16% | 2.6 m/s | 7.4 |
| 2005 | 39.7°C | 31.8°C | 23.8°C | 43.2°C | 18.9°C | 0 mm | 16% | 2.8 m/s | 7.8 |
| 2004 | 41.1°C | 32.4°C | 23.7°C | 43.8°C | 20.1°C | 0 mm | 11% | 2.5 m/s | 8 |
| 2003 | 41.1°C | 32.9°C | 24.6°C | 43.4°C | 19.7°C | 0 mm | 15% | 3.2 m/s | 7.5 |
| 2002 | 41.6°C | 33.0°C | 24.4°C | 44.2°C | 20.6°C | 0 mm | 13% | 2.7 m/s | 8.1 |
| 2001 | 41.4°C | 33.0°C | 24.6°C | 42.7°C | 22.7°C | 0 mm | 12% | 3 m/s | 7.9 |
| 2000 | 41.3°C | 33.1°C | 24.9°C | 43.9°C | 20.5°C | 0 mm | 13% | 2.7 m/s | 7.9 |
| 1999 | 41.4°C | 33.0°C | 24.6°C | 43.4°C | 22.8°C | 0 mm | 12% | 2.9 m/s | 8.1 |
| 1998 | 39.6°C | 32.1°C | 24.7°C | 44.3°C | 19.5°C | 30 mm | 26% | 2.5 m/s | 7.9 |
| 1997 | 39.5°C | 32.3°C | 25.0°C | 42.6°C | 21.6°C | 0 mm | 20% | 3.3 m/s | 7.6 |
| 1996 | 40.2°C | 32.6°C | 25.0°C | 43.2°C | 21.2°C | 0 mm | 17% | 2.9 m/s | 7.3 |
| 1995 | 39.6°C | 31.7°C | 23.8°C | 41.8°C | 22.1°C | 0 mm | 16% | 3.1 m/s | 7.5 |
| 1994 | 40.8°C | 32.9°C | 24.9°C | 44.0°C | 23.0°C | 0 mm | 17% | 3.4 m/s | 7.7 |
| 1993 | 38.6°C | 31.2°C | 23.8°C | 42.2°C | 20.1°C | 7 mm | 24% | 3.2 m/s | 7.2 |
| 1992 | 39.7°C | 32.1°C | 24.5°C | 42.5°C | 22.2°C | 5 mm | 20% | 2.9 m/s | 7.6 |
| 1991 | 39.9°C | 31.9°C | 23.9°C | 43.6°C | 21.0°C | 12 mm | 17% | 2.8 m/s | 7 |
| 1990 | 40.9°C | 32.9°C | 24.8°C | 44.0°C | 19.7°C | 1 mm | 13% | 2.5 m/s | 7.6 |
| 1989 | 39.4°C | 31.2°C | 23.1°C | 42.5°C | 20.1°C | 0 mm | 13% | 2.8 m/s | 7.8 |
| 1988 | 40.4°C | 31.8°C | 23.1°C | 42.7°C | 20.1°C | 0 mm | 13% | 2.8 m/s | 7.7 |
| 1987 | 39.3°C | 31.7°C | 24.0°C | 43.1°C | 21.7°C | 16 mm | 20% | 2.6 m/s | 6.9 |
| 1986 | 40.5°C | 32.3°C | 24.2°C | 42.3°C | 19.3°C | 0 mm | 17% | 3.3 m/s | 7.8 |
| 1985 | 38.5°C | 31.4°C | 24.2°C | 42.2°C | 22.1°C | 10 mm | 20% | 2.2 m/s | 7.2 |
| 1984 | 39.7°C | 32.2°C | 24.7°C | 42.3°C | 21.7°C | 0 mm | 17% | 2.9 m/s | 6.9 |
| 1983 | 38.7°C | 31.6°C | 24.4°C | 42.0°C | 21.0°C | 5 mm | 23% | 2.9 m/s | — |
| 1982 ❄️ | 38.8°C | 31.0°C | 23.2°C | 42.4°C | 20.8°C | 0 mm | 18% | 3.2 m/s | — |
| 1981 | 40.0°C | 32.1°C | 24.2°C | 43.0°C | 21.5°C | 4 mm | 17% | 2.8 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 40.3°C with lows near 24.7°C (mean 32.5°C), based on 45 years of NASA POWER data.
May averages 3 mm of rainfall in As Sulayyil, about average for rainfall. The wettest on record was 34 mm in 2013.
The hottest May reached 45.2°C in 2025. The coldest dipped to 18.9°C in 2005.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.3°C. Daytime highs moved from 39.1°C to 40.8°C and overnight lows from 24.1°C to 25.1°C over the same span.
May is one of the warmer months of the year in As Sulayyil and about average for rainfall, so plan for around 40.3°C daytime highs and 24.7°C at night.
Not quite — May is the 8th coolest month in As Sulayyil, averaging 32.5°C.
For May in As Sulayyil, pack light, breathable clothing and sun protection, with typical highs of 40.3°C and lows of 24.7°C.
Relative humidity in May averages 17% — relatively dry.
Average wind speed in May is 2.9 m/s. The windiest May on record averaged 3.4 m/s (1994).
The wettest May on record was 2013 with 34 mm. On average, May sees 3 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 As Sulayyil 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.
