Semnan weather by month & the best time to visit

🇮🇷 Iran · regional city · cold desert climate

The best time to visit Semnan is May — its sunniest month (Sunshine Score 97/100), with September and October close behind. Semnan averages about 3,285 hours of sunshine a year. Daytime highs around 30°C / 86°F and roughly 11 mm of rain in May.

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Sun hours / year

3,285

Sunniest month

May

Peak score

97/100

Rain / year

178 mm

Snow / year

≈16 cm

Midday UV at peak

10 (very high)

Population

125k

Elevation

1,118 m

When is the best time to visit Semnan?

For sunshine, the best time to visit Semnan is May, then September and October. The dullest month is January (0/100, 22 mm of rain). The full month-by-month picture is in the table below.

How sunny is Semnan?

Semnan is one of the sunniest places on Earth: about 3,285 hours of sunshine a year. 97 Sunshine Score points separate May (97) from January (0), so the month you pick matters. It ranks #29 of 42 destinations in Iran for annual sunshine, below the national median of 3,415 hours. The year's 178 mm of rain spreads fairly evenly across the months, with no pronounced dry season.

Sunshine Score by month

See Semnan on the interactive sunshine globe →

Nearby places for sunshine

• Sari Iran · 120 km · best in May · 2,451 h sun/yr
• Tehran Iran · 213 km · best in May · 3,219 h sun/yr
• Isfahan Iran · 348 km · best in Sep · 3,689 h sun/yr
• Rasht Iran · 397 km · best in May · 1,915 h sun/yr
• Yazd Iran · 416 km · best in Mar · 3,759 h sun/yr
• Ashgabat Turkmenistan · 509 km · best in Sep · 3,046 h sun/yr

Nearest destinations

• Nowshahr Iran · 218 km · 2,200 h sun/yr · best in May
• Karaj Iran · 242 km · 3,279 h sun/yr · best in May
• Kashan Iran · 257 km · 3,520 h sun/yr · best in Oct
• Ramsar Iran · 291 km · 2,569 h sun/yr · best in May