Jam in Summer
In summer (June, July and August), Jam sees average daytime highs around 34°C and overnight lows near 31°C, with 1 mm of rain over about 0 wet days across the season. It is the warmest season of the year and the driest season of the year.
Across summer, daytime highs hold fairly steady around 34°C. The sky is clear or mostly clear about 97% of the time across summer, and the air most often feels miserable.
Summer is Jam's weakest season of the year to visit on our travel score. For the whole year in context, see Jam's year-round climate.
- Avg daytime high
- 34°C
- warmest season of the year
- Avg overnight low
- 31°C
- Rainfall
- 1 mm
- 0 wet days
- Avg wind
- 10 km/h
- Travel score
- 3.9
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Jam in Summer
Across summer, daytime highs hold fairly steady around 34°C.
A typical summer day in Jam reaches about 34°C and drops to 31°C overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Jam
Once humidity and wind are folded in, summer brings about 92 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Jam weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 19° / 14° | 66 | 5.6 | 10.4 | 7.2 |
| Feb | 20° / 15° | 34 | 3.5 | 11 | 7.7 |
| Mar | 22° / 18° | 26 | 3.3 | 11.8 | 8.3 |
| Apr | 27° / 22° | 5 | 0.8 | 12.6 | 8.3 |
| May | 31° / 27° | 0 | 0.1 | 13.4 | 5.8 |
| Jun | 34° / 30° | 0 | 0 | 13.7 | 4.3 |
| Jul | 35° / 31° | 0 | 0 | 13.6 | 3.7 |
| Aug | 35° / 31° | 1 | 0.1 | 13 | 3.7 |
| Sep | 33° / 29° | 0 | 0 | 12.2 | 4.7 |
| Oct | 31° / 26° | 1 | 0.1 | 11.3 | 6.5 |
| Nov | 26° / 21° | 23 | 2.2 | 10.6 | 8.5 |
| Dec | 21° / 16° | 53 | 4.5 | 10.3 | 7.9 |
Cloud cover in Summer
The sky is clear or mostly clear about 97% of the time across summer.
Chance of precipitation in Summer
Jam gets around 1 mm of rain over 0 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 10 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 36 min in early June to 12 h 36 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 7.3 kWh/m².
Hazard calendar for Jam
In summer, Jam overlaps its dust season. The full year is below, with each hazard's peak months called out.
Jam sees seasonal dust haze (March–May), heaviest in April.
Is summer a good time to visit Jam?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Jam. The water and warmth also suit a beach or pool day.
What to pack for Jam in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Jam sees daytime highs around 34°C and nights near 31°C. Pack light clothes and sun protection.
Sea temperature near Jam in Summer
The nearest coast averages about 32°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 23 km away) is warmest in August at about 34°C and coldest in February near 22°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 23 | 22 | 22 | 24 | 27 | 30 | 32 | 34 | 33 | 31 | 28 | 25 |
| Comfort | Refreshing | Refreshing | Refreshing | Refreshing | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 23 | Refreshing |
| Feb | 22 | Refreshing |
| Mar | 22 | Refreshing |
| Apr | 24 | Refreshing |
| May | 27 | Warm |
| Jun | 30 | Tropical |
| Jul | 32 | Tropical |
| Aug | 34 | Tropical |
| Sep | 33 | Tropical |
| Oct | 31 | Tropical |
| Nov | 28 | Tropical |
| Dec | 25 | Warm |
UV index in Jam in Summer
Clear-sky midday UV across summer averages around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Jam peaks around June 18 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 4 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 4 | 7 | 8 | 6 | 9 | 11 | 10 | 10 | 7 | 7 | 5 | 4 |
| Level | Moderate | Very high | Very high | High | Very high | Extreme | Extreme | Very high | High | Very high | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 7 | Very high |
| Mar | 8 | Very high |
| Apr | 6 | High |
| May | 9 | Very high |
| Jun | 11 | Extreme |
| Jul | 10 | Extreme |
| Aug | 10 | Very high |
| Sep | 7 | High |
| Oct | 7 | Very high |
| Nov | 5 | High |
| Dec | 4 | Moderate |
Air quality in Jam in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Jam is worst in July — around 56 µg/m³ PM2.5 (unhealthy), about 2.1× the cleanest month (November, 26 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 30 | 32 | 37 | 41 | 45 | 42 | 56 | 46 | 39 | 34 | 26 | 27 |
| Level | Moderate | Moderate | Poor | Poor | Poor | Poor | Unhealthy | Poor | Poor | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 30 | Moderate |
| Feb | 32 | Moderate |
| Mar | 37 | Poor |
| Apr | 41 | Poor |
| May | 45 | Poor |
| Jun | 42 | Poor |
| Jul | 56 | Unhealthy |
| Aug | 46 | Poor |
| Sep | 39 | Poor |
| Oct | 34 | Moderate |
| Nov | 26 | Moderate |
| Dec | 27 | Moderate |
Where is Jam?
Jam sits at 27.8°N, 52.3°E, 622 m above sea level, in Iran. The nearest listed city is Makū, 10 km away.
Topography around Jam
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Jam.
Within 3 km, the terrain around Jam has only modest variations in elevation — a maximum elevation change of 166 m around an average of 652 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,518 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,093 m.
The land around Jam is covered by bare terrain (44%) and artificial surfaces (32%) within 3 km, bare terrain (79%) within 16 km, and bare terrain (64%) and water (25%) within 80 km.
Iran travel facts
- Travel advisory
- Level 4
- Do Not Travel
- Power plugs
- Type C / F
- 220 V · 50 Hz
- Prices
- ≈ 352% of US
- price level, 2025
- GDP per capita
- $3,924
- 2025
- Happiness
- 5.2 / 10
- World Happiness, 2025
- Safe drinking water
- 94%
- of population, 2024
- Homicide rate
- 2.4
- per 100k, 2014
- Road deaths
- 21.5
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 492
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Jam (27.8298°, 52.3252°, elevation 622 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.