Suwaylih climate
Suwaylih (Jordan) has a cold semi-arid climate (Köppen BSk). The average temperature over the year is 16 °C61 °F, and about 265 mm10 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Suwaylih climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 1253 | 032 | 643 | 632.5 |
| Feb | 1457 | 134 | 745 | 582.3 |
| Mar | 1864 | 439 | 1151 | 311.2 |
| Apr | 2272 | 744 | 1458 | 150.6 |
| May | 2781 | 1151 | 1966 | 60.2 |
| Jun | 3188 | 1457 | 2272 | 10.0 |
| Jul | 3391 | 1660 | 2476 | 00.0 |
| Aug | 3391 | 1661 | 2476 | 10.0 |
| Sep | 3086 | 1558 | 2272 | 10.0 |
| Oct | 2679 | 1254 | 1966 | 80.3 |
| Nov | 1966 | 745 | 1356 | 291.1 |
| Dec | 1457 | 236 | 847 | 522.0 |
| Year | 3391 | 032 | 1661 | 26510 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 68% | 57% | 2.9 | 10:16 |
| Feb | 66% | 55% | 3.7 | 11:00 |
| Mar | 63% | 48% | 5.1 | 11:54 |
| Apr | 56% | 44% | 6.3 | 12:56 |
| May | 49% | 32% | 7.4 | 13:47 |
| Jun | 47% | 14% | 8.2 | 14:14 |
| Jul | 49% | 12% | 8.0 | 14:03 |
| Aug | 53% | 13% | 7.3 | 13:19 |
| Sep | 54% | 15% | 6.2 | 12:19 |
| Oct | 53% | 28% | 4.7 | 11:19 |
| Nov | 55% | 40% | 3.4 | 10:28 |
| Dec | 63% | 52% | 2.7 | 10:04 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Suwaylih is like
The warmest month is August, with an average high of 33 °C91 °F and a low of 16 °C61 °F. The coldest is January, when highs average 12 °C53 °F and lows 0 °C32 °F. Seasons are strongly marked: the warmest month is on average 18.3 °C33 °F warmer than the coldest.
It is dry, with about 265 mm10 in of precipitation per year. The wettest three-month stretch is December–February, which brings 65% of the annual total. Months with less than 20 mm0.8 in on average: April–October. The wettest month is January (63 mm2.5 in), the driest is July (0 mm0.0 in).
Relative humidity ranges from 47% in June to 68% in January. The clearest skies (lowest average cloud amount, 12%) are typical of July. Average wind speed near the ground ranges from 7 km/h (4 mph) in October to 9 km/h (5 mph) in July. Daylight lasts from about 10.1 hours in December to 14.2 hours in June.
Best time to visit Suwaylih
Based on these averages, the most comfortable months for sightseeing and outdoor activities are April and May and October and November: average highs of 19 °C66 °F to 27 °C81 °F with 6 mm0.2 in to 29 mm1.1 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of 12 °C53 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Suwaylih
- Winter (December–February) — highs 1253 to 14 °C57 °F, lows 032 to 2 °C36 °F, about 58 mm2.3 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an extra layer for the cooler mornings and evenings.
- Spring (March–May) — highs 1864 to 27 °C81 °F, lows 439 to 11 °C51 °F, about 17 mm0.7 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
- Summer (June–August) — highs 3188 to 33 °C91 °F, lows 1457 to 16 °C61 °F, about 1 mm0.0 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water and an extra layer for the cooler mornings and evenings.
- Autumn (September–November) — highs 1966 to 30 °C86 °F, lows 745 to 15 °C58 °F, about 13 mm0.5 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
How Suwaylih compares
Compared with Amman, about 12 km to the southeast, Suwaylih is on average 1.8 °C3.2 °F cooler and receives 42% more precipitation (265 mm10 in vs 187 mm7.4 in). The difference is largest in June (2.3 °C4.1 °F cooler).
Of the 6 places in Jordan covered by World Climates, Suwaylih is the 6th warmest by annual mean temperature and the 3rd wettest by annual precipitation. See all of them on the Jordan climate page.
Places in other countries with the most similar temperature and rainfall pattern: Hebron (Palestine, BSk), Jerusalem (Israel, Csa) and Lancaster (United States, BSk).
The same NASA POWER grid cell also contains As Salţ (pop. 107,874). Their long-term averages in this dataset are essentially the same as for Suwaylih, so they do not have separate pages.
Nearby places
- Amman 12 km · 18 °C64 °F · 187 mm7.4 in
- Khuraybat as Suq 17 km · 17 °C62 °F · 265 mm10 in
- Zarqa 24 km · 19 °C66 °F · 187 mm7.4 in
- Irbid 59 km · 18 °C64 °F · 372 mm15 in
- Nablus 60 km · 18 °C64 °F · 358 mm14 in
- Ar Ramtha 62 km · 19 °C67 °F · 207 mm8.2 in
- Jerusalem 66 km · 16 °C62 °F · 358 mm14 in
- Hebron 90 km · 16 °C61 °F · 240 mm9.5 in
Frequently asked questions
What is the warmest month in Suwaylih?
August is the warmest month in Suwaylih, with an average high of 33 °C (91 °F) and an average low of 16 °C (61 °F).
What is the coldest month in Suwaylih?
January is the coldest month, with an average high of 12 °C (53 °F) and an average low of 0 °C (32 °F).
When does it rain the most in Suwaylih?
January is the wettest month with about 63 mm (2.5 in) of precipitation; July is the driest with about 0 mm (0.0 in).
What is the best time to visit Suwaylih?
Judging by long-term averages, the most comfortable months are April and May and October and November.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 164 m, while Suwaylih lies at about 981 m. Temperatures on this page were therefore adjusted by −5.3 °C9.6 °F using the standard lapse rate of 6.5 °C per 1,000 m.