Īstgāh-e Rāh Āhan-e Garmsār, Iran Climate
The warmest month is July, with an average high of 40°C; the coldest is January, with an average low of 1°C. A normal year brings 170 mm of precipitation.
Temperature through the year
The normal daily high and low. The line marks today.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
Normals for Sep 26
- Normal high
- 32°C
- Normal low
- 18°C
- Reanalysis high
- 37°Cin 2019
- Reanalysis low
- 16°Cin 2009
- Chance of a wet day
- 7%
- Daylight
- 12 h 00 min
Month by month
Averages for 1991-2020. Wet days have at least 1 mm of precipitation in the reanalysis. Each month links to its own page.
| Month | Avg high | Avg low | Warmest | Coldest | Precipitation | Wet days |
|---|---|---|---|---|---|---|
| January | 12°C | 1°C | 20°C (1997) | -10°C (2008) | 22 mm | 6.2 |
| February | 14°C | 2°C | 25°C (2001) | -8°C (2014) | 20 mm | 5.7 |
| March | 20°C | 6°C | 34°C (2018) | -5°C (1992) | 25 mm | 6.2 |
| April | 26°C | 12°C | 37°C (2016) | 0°C (2014) | 21 mm | 6.0 |
| May | 32°C | 18°C | 41°C (2001) | 6°C (1992) | 12 mm | 3.1 |
| June | 38°C | 23°C | 44°C (2015) | 15°C (2000) | 6 mm | 0.0 |
| July | 40°C | 26°C | 46°C (2018) | 19°C (2015) | 3 mm | 0.0 |
| August | 39°C | 25°C | 45°C (2019) | 15°C (2011) | 3 mm | 0.0 |
| September | 34°C | 20°C | 41°C (2017) | 12°C (2020) | 6 mm | 3.0 |
| October | 27°C | 15°C | 36°C (2002) | 6°C (2011) | 12 mm | 3.1 |
| November | 18°C | 7°C | 32°C (2016) | -7°C (2016) | 21 mm | 6.0 |
| December | 13°C | 2°C | 23°C (1998) | -6°C (1994) | 19 mm | 6.2 |
| Year | 26°C | 13°C | 170 mm | 46 |
Precipitation
Rain and melted snow together. The chance of a wet day is the share of days with at least 1 mm of precipitation in the reanalysis.
170 mm in a normal year, most in March.
Chance of a wet day
- Chance of a wet day
Humidity and comfort
NASA POWER reanalysis, 1991-2020, for the grid cell around Īstgāh-e Rāh Āhan-e Garmsār.
Days with a mean dew point of 18°C or more are rare here in every month.
| Month | Dew point | Humidity | Dry | Comfortable | Humid | Muggy | Oppressive | Miserable |
|---|---|---|---|---|---|---|---|---|
| January | -4°C | 55% | 100% | 0% | 0% | 0% | 0% | 0% |
| February | -3°C | 51% | 100% | 0% | 0% | 0% | 0% | 0% |
| March | -1°C | 44% | 100% | 0% | 0% | 0% | 0% | 0% |
| April | 3°C | 39% | 100% | 0% | 0% | 0% | 0% | 0% |
| May | 4°C | 30% | 100% | 0% | 0% | 0% | 0% | 0% |
| June | 4°C | 22% | 100% | 0% | 0% | 0% | 0% | 0% |
| July | 6°C | 21% | 99% | 1% | 0% | 0% | 0% | 0% |
| August | 5°C | 22% | 98% | 2% | 0% | 0% | 0% | 0% |
| September | 4°C | 26% | 100% | 0% | 0% | 0% | 0% | 0% |
| October | 3°C | 35% | 100% | 0% | 0% | 0% | 0% | 0% |
| November | 0°C | 47% | 100% | 0% | 0% | 0% | 0% | 0% |
| December | -2°C | 55% | 100% | 0% | 0% | 0% | 0% | 0% |
Comfort is judged by the day's mean dew point: dry below 13°C, comfortable to 16°C, humid to 18°C, muggy to 21°C, oppressive to 24°C, miserable above.
Clouds
Average share of the sky covered, from satellite (CERES and GEWEX SRB) by way of NASA POWER, 1991-2020.
The clearest month is September, with the sky 37 percent covered on average; the cloudiest is April, at 64 percent.
Wind
The mean wind speed over the whole day, from the MERRA-2 reanalysis by way of NASA POWER. Gusts run well above it.
The windiest month is July, averaging 21.2 km/h at 10 meters (33 feet) above the ground.
Daylight and sunshine
The longest day is Jun 20, with 14 h 33 min of daylight; the shortest is Dec 19, with 9 h 46 min.
- Day length
Solar energy
Average daily sunshine reaching the ground on a flat surface, in kilowatt-hours per square meter, clouds included.
Month pages
The weather in Īstgāh-e Rāh Āhan-e Garmsār in each month, day by day.
What this means
A normal is the average of the thirty years 1991 to 2020, the period the World Meteorological Organization and NOAA use for comparison. It is an average, not a forecast: most days depart from it, and some by a long way.
Where no station record is within reach, the extremes shown are the highest and lowest the reanalysis produced for the date in 1991-2020, not measured records.
Cloud, humidity, wind and sunshine come from a reanalysis: a weather model run over the past with every observation fed in, averaged over a grid cell about 50 km across. It is consistent everywhere on Earth; it smooths local detail such as a lake shore or a valley.
More for this place
Nearby
Sources
Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.