Semnan Climate by Month
Semnan, Iran
Very hot summers and cool winters, with little rain.
Semnan has very hot summers and cool winters, with little rain. Expect highs of 101°F (38°C) in July and 51°F (10°C) in January, with the coldest nights (January) near 35°F (2°C). It gets only 8.8 in (223 mm) of rain a year. June to August are almost completely dry. The air is dry, averaging 39% relative humidity.
- Warmest month
- 101°F(38°C)
- Average high, July
- Coldest nights
- 35°F(2°C)
- Average low, January
- Rain per year
- 8.8 in(223 mm)
- No clear rainy season
- Humidity
- 39%
- Sunniest: June
Best and worst months in Semnan
Best for weatherApril is the best time for weather in Semnan: highs near 76°F (25°C) and about 0.9 in (22 mm) of rain a month.
Least pleasantJanuary and July are the least pleasant; January is the coldest, with highs of only 51°F (10°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in April.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Semnan weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 51°F(10°C) | 35°F(2°C) | 1.0 in(26 mm) | 54% | 2.6 |
| FebFebruary | 56°F(13°C) | 38°F(4°C) | 1.0 in(26 mm) | 45% | 3.5 |
| MarMarch | 66°F(19°C) | 47°F(8°C) | 1.1 in(28 mm) | 39% | 4.3 |
| AprAprilBest | 76°F(25°C) | 57°F(14°C) | 0.9 in(22 mm) | 36% | 5.0 |
| MayMay | 87°F(31°C) | 66°F(19°C) | 0.5 in(12 mm) | 32% | 6.1 |
| JunJune | 97°F(36°C) | 76°F(24°C) | 0.3 in(7 mm) | 28% | 7.0 |
| JulJuly | 101°F(38°C) | 80°F(27°C) | 0.2 in(5 mm) | 28% | 6.9 |
| AugAugust | 99°F(37°C) | 78°F(26°C) | 0.2 in(6 mm) | 28% | 6.5 |
| SepSeptember | 92°F(33°C) | 70°F(21°C) | 0.4 in(11 mm) | 33% | 5.5 |
| OctOctober | 79°F(26°C) | 59°F(15°C) | 0.9 in(24 mm) | 41% | 4.1 |
| NovNovember | 63°F(17°C) | 46°F(8°C) | 1.3 in(32 mm) | 49% | 3.0 |
| DecDecember | 53°F(12°C) | 37°F(3°C) | 0.9 in(24 mm) | 59% | 2.5 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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