Isfahan (Esfahan) weather in May
May in Isfahan: hot, dry — an excellent time to visit.
Updated September 2026 · climate normals from ERA5 reanalysis
#3 of 12 months in Isfahan · #328 of 1413 destinations to visit in May · comfort 87/100 (tier A)
- Days
- 31°C
- Nights
- 12°C
- Wet days
- 2
- Sun
- 12.5 h
- Humidity
- 26%
- Daylight
- 14 h
Traveller notes on Isfahan in May
Other months in Isfahan
Forum posters consistently rate October among Iran's best travel windows weather-wise, alongside late March through May, describing conditions as still very nice - not cold, and not the intense heat of summer even in the country's warmer southern regions. Posters specifically flag October's added logistical benefit: school holidays have just ended, meaning noticeably fewer domestic crowds at popular sites than during the summer or early-autumn peak. Posters note Isfahan itself can turn a bit chilly at certain points in the season, though overall the balance stays comfortable. Posters generally rate October as one of the best, most balanced months to visit Isfahan, pairing pleasant temperatures with lighter crowds.
Early April to the end of May is the window the Iran forum agrees on, and April is high season for good reason: Isfahan runs near 24°C by day, rain down to about three days, and humidity the forum puts in the 30s. The nights are the surprise — an average low near 9°C, so a sweatshirt earns its place even in a warm, dry month. Regulars add a timing note that has nothing to do with weather: late March is Nowruz, when Iranians travel domestically and sites fill up, so April is both warmer and calmer than the fortnight before it.
Add your own note from Isfahan's card on the map.
Isfahan climate normals — May
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Isfahan in May
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusyMuharram and Ashura, school holidays in 2 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Isfahan's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Best weatherIsfahan's best weather comes in April, May and October — separate windows, not one continuous season.
May includes Water in the Zayanderud.
Best weatherFair weatherToughest weather
What's on in Isfahan in May
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
Water in the Zayanderud
15 Mar – 15 May · usuallyHigh waterThe river is dry most of the year and the authorities release water from the dam for a few weeks, usually in spring for the farmers downstream, though releases have become erratic in drought years. When it runs, the arches of Si-o-se-pol reflect and the city goes down to the bank in the evening. Source ↗
- Holiday
Muharram and Ashura
25 May – 10 Jul · usuallyMuharram & AshuraClosuresBlack banners across the bazaar, street kitchens giving out food and processions after dark, ending on Ashura when almost everything closes. Music venues are shut for the whole ten days. Source ↗
Where is Isfahan?
Isfahan in May — FAQ
- Is May a good time to visit Isfahan?
- May in Isfahan: hot, dry — an excellent time to visit. It ranks #3 of 12 months for Isfahan on SeasonMap's comfort score (87/100).
- What is the weather like in Isfahan in May?
- In May, Isfahan averages a daily high of 30.8°C and a low of 12°C, with about 6.9 mm of rain over roughly 2.3 rainy days.
- What is the air quality in Isfahan in May?
- Isfahan has a mean US Air Quality Index of about 69 in May.