January is one of the cooler months of the year in As Sulayyil, with average highs near 24.8°C and lows around 10.2°C (mean 17.5°C). It is about average for rainfall, averaging 1 mm of rainfall and 37% relative humidity across the period.
January is one of the cooler months of the year in As Sulayyil. Across 45 years of records, the warmest January in As Sulayyil was 2004 — when the month averaged 20.5°C — while the coldest was 1989 at 14.7°C. Typical January days reach 24.8°C with nights near 10.2°C. The long-term trend is warming, about 0.3°C per decade.
January is about average for rainfall in As Sulayyil, averaging 1 mm of rainfall. The wettest January on record was 2003 with 15 mm, while the driest were 2021, 2024 and 2025, among others at 0 mm.
Relative humidity in As Sulayyil during January averages 37%. The most humid January was 2023 at 48%, and the least humid was 2015 at 26%.
January receives about 4.9 kWh/m²/day of solar energy in As Sulayyil. The sunniest January was 2001 at 5.4 kWh/m²/day, and the cloudiest was 2011 at 4.3.
Average wind speed in As Sulayyil during January is 3 m/s. The windiest Januarys were 1990, 1992 and 1998 at 3.5 m/s, while the calmest was 2015 at 2.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.7°C | 17.7°C | 17.4°C | 17.7°C | 18.2°C | +1.5°C |
| Avg High | 24.2°C | 24.7°C | 24.7°C | 25.4°C | 25.3°C | +1.1°C |
| Avg Low | 9.2°C | 10.7°C | 10.1°C | 10.0°C | 11.0°C | +1.8°C |
| Avg Rain | 3 mm | 0 mm | 2 mm | 0 mm | 0 mm | -3 mm |
January temperatures in As Sulayyil have risen by about 1.1°C between 1981–1985 and 2021–2025.
January has ranged from a record low of 0.5°C (2007) to a record high of 34.9°C (1981).
Rainfall in January is about average for rainfall, averaging 1 mm, with a wettest year of 15 mm.
A good time to visit As Sulayyil
January is a good time to visit As Sulayyil, with days averaging 24.8°C and nights around 10.2°C (mean 17.5°C, cooler than As Sulayyil's yearly average) and low rainfall. November and February are marginally more temperate, but January still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 24.0°C | 16.8°C | 9.5°C | 27.7°C | 5.3°C | 0 mm | 34% | 3 m/s | 5.1 |
| 2024 | 27.5°C | 20.3°C | 13.1°C | 32.6°C | 6.3°C | 0 mm | 37% | 2.8 m/s | 4.9 |
| 2023 | 24.9°C | 18.4°C | 11.8°C | 31.3°C | 8.5°C | 0 mm | 48% | 3.4 m/s | 4.4 |
| 2022 | 26.0°C | 18.9°C | 11.8°C | 31.7°C | 7.3°C | 1 mm | 33% | 3 m/s | 4.7 |
| 2021 | 24.9°C | 17.4°C | 10.0°C | 30.9°C | 5.6°C | 0 mm | 34% | 2.9 m/s | 5.1 |
| 2020 | 24.8°C | 17.4°C | 9.9°C | 32.3°C | 3.3°C | 0 mm | 34% | 3 m/s | 5.2 |
| 2019 | 27.2°C | 19.2°C | 11.1°C | 31.4°C | 7.7°C | 0 mm | 32% | 3 m/s | 4.9 |
| 2018 | 24.1°C | 16.1°C | 8.1°C | 30.7°C | 3.3°C | 0 mm | 27% | 2.6 m/s | 5.2 |
| 2017 | 27.3°C | 19.0°C | 10.6°C | 31.7°C | 6.8°C | 0 mm | 28% | 2.8 m/s | 5.2 |
| 2016 | 24.9°C | 18.5°C | 12.0°C | 32.1°C | 6.9°C | 0 mm | 35% | 3.2 m/s | 4.8 |
| 2015 | 24.5°C | 16.4°C | 8.3°C | 33.0°C | 4.0°C | 0 mm | 26% | 2.5 m/s | 5.2 |
| 2014 | 24.4°C | 17.1°C | 9.9°C | 30.3°C | 5.6°C | 0 mm | 42% | 3.1 m/s | 5 |
| 2013 | 25.2°C | 17.6°C | 10.0°C | 32.8°C | 2.7°C | 0 mm | 31% | 2.9 m/s | 5.1 |
| 2012 | 26.3°C | 17.9°C | 9.5°C | 32.7°C | 4.1°C | 0 mm | 29% | 2.8 m/s | 5.2 |
| 2011 | 24.6°C | 17.9°C | 11.3°C | 31.2°C | 7.3°C | 0 mm | 44% | 3.4 m/s | 4.3 |
| 2010 | 25.1°C | 17.3°C | 9.6°C | 31.5°C | 4.3°C | 0 mm | 33% | 2.8 m/s | 5.3 |
| 2009 | 23.8°C | 16.4°C | 9.0°C | 31.0°C | 2.8°C | 1 mm | 34% | 2.9 m/s | 5 |
| 2008 | 24.1°C | 17.3°C | 10.5°C | 31.6°C | 5.0°C | 0 mm | 44% | 3.4 m/s | 4.5 |
| 2007 | 22.9°C | 16.0°C | 9.1°C | 30.5°C | 0.5°C | 0 mm | 37% | 3.3 m/s | 5 |
| 2006 | 25.5°C | 17.8°C | 10.2°C | 32.1°C | 5.9°C | 0 mm | 37% | 3.1 m/s | 5.1 |
| 2005 | 24.4°C | 17.5°C | 10.5°C | 31.1°C | 4.2°C | 0 mm | 42% | 3.2 m/s | 4.8 |
| 2004 🔥 | 27.8°C | 20.5°C | 13.3°C | 33.5°C | 9.4°C | 0 mm | 40% | 2.9 m/s | 4.9 |
| 2003 🌧️ | 24.5°C | 17.0°C | 9.5°C | 33.6°C | 4.3°C | 15 mm | 37% | 2.6 m/s | 5.2 |
| 2002 | 24.7°C | 18.1°C | 11.4°C | 30.8°C | 5.7°C | 0 mm | 36% | 3.3 m/s | 4.9 |
| 2001 | 23.0°C | 15.2°C | 7.4°C | 28.0°C | 4.3°C | 0 mm | 34% | 2.8 m/s | 5.4 |
| 2000 | 25.8°C | 18.0°C | 10.3°C | 30.7°C | 7.5°C | 0 mm | 37% | 3 m/s | 5.1 |
| 1999 | 25.0°C | 17.9°C | 10.8°C | 29.8°C | 5.3°C | 0 mm | 37% | 2.9 m/s | 5.1 |
| 1998 | 25.1°C | 18.8°C | 12.4°C | 31.7°C | 2.9°C | 1 mm | 41% | 3.5 m/s | 4.6 |
| 1997 | 24.0°C | 17.1°C | 10.1°C | 31.1°C | 4.4°C | 0 mm | 36% | 3.2 m/s | 4.9 |
| 1996 | 25.7°C | 18.9°C | 12.2°C | 30.6°C | 6.3°C | 0 mm | 44% | 3.4 m/s | 4.9 |
| 1995 | 24.8°C | 17.2°C | 9.5°C | 30.8°C | 6.7°C | 0 mm | 40% | 3.1 m/s | 5.2 |
| 1994 | 25.6°C | 17.6°C | 9.6°C | 30.6°C | 5.8°C | 0 mm | 35% | 2.8 m/s | 5 |
| 1993 | 23.8°C | 16.6°C | 9.5°C | 31.9°C | 4.2°C | 0 mm | 42% | 3.1 m/s | 4.5 |
| 1992 | 22.1°C | 16.0°C | 9.8°C | 31.2°C | 1.9°C | 0 mm | 44% | 3.5 m/s | 4.8 |
| 1991 | 26.6°C | 19.4°C | 12.2°C | 34.4°C | 5.5°C | 0 mm | 39% | 3.2 m/s | 4.9 |
| 1990 | 24.0°C | 17.4°C | 10.8°C | 29.7°C | 5.6°C | 0 mm | 44% | 3.5 m/s | 4.8 |
| 1989 ❄️ | 22.3°C | 14.7°C | 7.2°C | 28.1°C | 3.0°C | 0 mm | 29% | 3.1 m/s | 5 |
| 1988 | 24.1°C | 16.9°C | 9.6°C | 31.6°C | 4.6°C | 0 mm | 34% | 3.2 m/s | 4.6 |
| 1987 | 24.0°C | 16.5°C | 9.0°C | 30.8°C | 5.2°C | 14 mm | 39% | 2.7 m/s | 4.6 |
| 1986 | 24.0°C | 15.9°C | 7.8°C | 28.5°C | 3.1°C | 3 mm | 32% | 2.8 m/s | 4.8 |
| 1985 | 26.8°C | 19.2°C | 11.5°C | 31.6°C | 6.6°C | 1 mm | 40% | 3.3 m/s | 4.8 |
| 1984 | 23.0°C | 15.4°C | 7.9°C | 29.5°C | 4.1°C | 1 mm | 37% | 2.8 m/s | 4.8 |
| 1983 | 22.4°C | 15.1°C | 7.7°C | 28.9°C | 3.6°C | 4 mm | 44% | 3.2 m/s | — |
| 1982 | 24.4°C | 17.9°C | 11.4°C | 33.2°C | 8.3°C | 5 mm | 41% | 3.4 m/s | — |
| 1981 | 27.0°C | 19.0°C | 10.9°C | 34.9°C | 5.7°C | 0 mm | 38% | 2.8 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 24.8°C with lows near 10.2°C (mean 17.5°C), based on 45 years of NASA POWER data.
January averages 1 mm of rainfall in As Sulayyil, about average for rainfall. The wettest on record was 15 mm in 2003.
The hottest January reached 34.9°C in 1981. The coldest dipped to 0.5°C in 2007.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 1.1°C. Daytime highs moved from 24.7°C to 25.5°C and overnight lows from 9.9°C to 11.2°C over the same span.
January is one of the cooler months of the year in As Sulayyil and about average for rainfall, so plan for around 24.8°C daytime highs and 10.2°C at night.
Yes — January is the coldest month of the year in As Sulayyil, averaging 17.5°C.
For January in As Sulayyil, pack light layers you can adjust through the day, with typical highs of 24.8°C and lows of 10.2°C.
Relative humidity in January averages 37% — relatively dry.
Average wind speed in January is 3 m/s. The windiest January on record averaged 3.5 m/s (1990).
The wettest January on record was 2003 with 15 mm. On average, January sees 1 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 January, 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 January specifically, along with year-by-year records and how the month has changed over the decades.
