Zīr Āb weather in September
In September, Zīr Āb sees average daytime highs of 24°C and overnight lows near 16°C, with 153 mm of rain across 14 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 1st-wettest month of the year here.
Highs ease over the month, from about 26°C in the first days to 23°C by the end. The sky is clear or mostly clear about 36% of the time in September, and the air most often feels humid.
Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Zīr Āb's 7th-clearest and 10th-windiest month. For the whole year in context, see Zīr Āb's year-round climate.
- Daytime high
- 24°
- 4th warmest
- Overnight low
- 16°
- 9th coldest
- Rainfall
- 153 mm
- 14 wet days
- Daylight
- 12 h 12 min
- 5:46 AM – 5:59 PM
- Cloud cover
- 55%
- 7th clearest
- Wind
- 5 km/h
- 10th windiest
- Solar energy
- 4.34 kWh/m²
- Travel score
- 6.2
- out of 10
Zīr Āb is city in Mazandaran Province, Iran.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Highs ease over the month, from about 26°C in the first days to 23°C by the end.
A typical September day in Zīr Āb reaches about 24°C in the afternoon and slips back to 16°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 28°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 22 |
| Avg low (°C) | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 26 | 18 |
| 2 | 26 | 18 |
| 3 | 26 | 18 |
| 4 | 26 | 18 |
| 5 | 26 | 18 |
| 6 | 26 | 18 |
| 7 | 26 | 18 |
| 8 | 25 | 18 |
| 9 | 25 | 17 |
| 10 | 25 | 17 |
| 11 | 25 | 17 |
| 12 | 25 | 17 |
| 13 | 25 | 17 |
| 14 | 25 | 17 |
| 15 | 25 | 17 |
| 16 | 24 | 16 |
| 17 | 24 | 16 |
| 18 | 24 | 16 |
| 19 | 24 | 16 |
| 20 | 24 | 16 |
| 21 | 24 | 16 |
| 22 | 24 | 15 |
| 23 | 24 | 15 |
| 24 | 23 | 15 |
| 25 | 23 | 15 |
| 26 | 23 | 15 |
| 27 | 23 | 14 |
| 28 | 23 | 14 |
| 29 | 23 | 14 |
| 30 | 22 | 14 |
How September really feels in Zīr Āb
Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Zīr Āb weather by month
How September compares with the rest of the year at a glance. September is the 4th-warmest and 1st-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 9° / -1° | 71 | 9.7 | 6 | 9.8 | 2.0 |
| Feb | 10° / -0° | 79 | 11 | 6.3 | 10.6 | 2.2 |
| Mar | 13° / 3° | 100 | 14.3 | 4.5 | 11.7 | 3.4 |
| Apr | 17° / 8° | 98 | 15.1 | 0.9 | 12.9 | 4.8 |
| May | 21° / 13° | 105 | 16 | 0 | 13.9 | 5.6 |
| Jun | 25° / 17° | 75 | 11.8 | 0 | 14.4 | 6.5 |
| Jul | 27° / 19° | 73 | 12.8 | 0 | 14.2 | 6.2 |
| Aug | 27° / 19° | 83 | 12.3 | 0 | 13.4 | 6.2 |
| Sep | 24° / 16° | 153 | 14 | 0 | 12.2 | 6.2 |
| Oct | 20° / 11° | 124 | 12.6 | 0 | 11.1 | 6.1 |
| Nov | 15° / 5° | 105 | 11.9 | 1.8 | 10.1 | 4.4 |
| Dec | 11° / 1° | 69 | 9.3 | 4 | 9.6 | 2.9 |
Cloud cover in September
The sky is clear or mostly clear about 36% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 52%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 53 | 52 | 52 | 51 | 51 | 49 | 49 | 48 | 47 | 46 | 46 | 46 | 44 | 44 | 45 | 46 | 46 | 46 | 46 | 47 | 48 | 48 | 49 | 49 | 50 | 50 | 50 | 50 | 50 | 50 |
| Cloudier (%) | 47 | 48 | 48 | 49 | 49 | 51 | 51 | 52 | 53 | 54 | 54 | 54 | 56 | 56 | 55 | 54 | 54 | 54 | 54 | 53 | 52 | 52 | 51 | 51 | 50 | 50 | 50 | 50 | 50 | 50 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 53 | 47 |
| 2 | 52 | 48 |
| 3 | 52 | 48 |
| 4 | 51 | 49 |
| 5 | 51 | 49 |
| 6 | 49 | 51 |
| 7 | 49 | 51 |
| 8 | 48 | 52 |
| 9 | 47 | 53 |
| 10 | 46 | 54 |
| 11 | 46 | 54 |
| 12 | 46 | 54 |
| 13 | 44 | 56 |
| 14 | 44 | 56 |
| 15 | 45 | 55 |
| 16 | 46 | 54 |
| 17 | 46 | 54 |
| 18 | 46 | 54 |
| 19 | 46 | 54 |
| 20 | 47 | 53 |
| 21 | 48 | 52 |
| 22 | 48 | 52 |
| 23 | 49 | 51 |
| 24 | 49 | 51 |
| 25 | 50 | 50 |
| 26 | 50 | 50 |
| 27 | 50 | 50 |
| 28 | 50 | 50 |
| 29 | 50 | 50 |
| 30 | 50 | 50 |
Chance of precipitation in September
Zīr Āb gets around 153 mm of rain over 14 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 47% and peaks near 50% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 44 | 45 | 45 | 46 | 47 | 48 | 48 | 49 | 49 | 49 | 50 | 50 | 50 | 50 | 49 | 49 | 48 | 48 | 47 | 47 | 46 | 45 | 45 | 44 | 44 | 44 | 44 | 44 | 44 | 44 |
| Rain chance (%) | |
|---|---|
| 1 | 44 |
| 2 | 45 |
| 3 | 45 |
| 4 | 46 |
| 5 | 47 |
| 6 | 48 |
| 7 | 48 |
| 8 | 49 |
| 9 | 49 |
| 10 | 49 |
| 11 | 50 |
| 12 | 50 |
| 13 | 50 |
| 14 | 50 |
| 15 | 49 |
| 16 | 49 |
| 17 | 48 |
| 18 | 48 |
| 19 | 47 |
| 20 | 47 |
| 21 | 46 |
| 22 | 45 |
| 23 | 45 |
| 24 | 44 |
| 25 | 44 |
| 26 | 44 |
| 27 | 44 |
| 28 | 44 |
| 29 | 44 |
| 30 | 44 |
Humidity in September
Most of September feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the humid band about 35% of days. Sticky, muggy-or-worse air turns up on roughly 32% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 5 | 5 | 6 | 7 | 7 | 8 | 9 | 10 | 11 | 13 | 14 | 16 | 17 | 19 | 21 | 23 | 25 |
| Comfortable (%) | 14 | 14 | 14 | 15 | 15 | 16 | 16 | 16 | 17 | 17 | 18 | 19 | 20 | 20 | 22 | 23 | 24 | 25 | 27 | 29 | 30 | 32 | 33 | 35 | 36 | 37 | 38 | 39 | 40 | 40 |
| Humid (%) | 28 | 29 | 29 | 30 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 38 | 39 | 40 | 40 | 40 | 41 | 41 | 40 | 40 | 39 | 38 | 36 | 35 | 34 | 32 | 31 | 29 |
| Muggy (%) | 50 | 49 | 49 | 48 | 48 | 47 | 46 | 45 | 44 | 42 | 40 | 39 | 37 | 35 | 33 | 30 | 28 | 26 | 24 | 21 | 19 | 17 | 15 | 13 | 12 | 10 | 9 | 8 | 7 | 6 |
| Oppressive (%) | 6 | 5 | 5 | 5 | 4 | 4 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 3 | 14 | 28 | 50 | 6 |
| 2 | 3 | 14 | 29 | 49 | 5 |
| 3 | 3 | 14 | 29 | 49 | 5 |
| 4 | 3 | 15 | 30 | 48 | 5 |
| 5 | 3 | 15 | 30 | 48 | 4 |
| 6 | 3 | 16 | 31 | 47 | 4 |
| 7 | 3 | 16 | 32 | 46 | 3 |
| 8 | 3 | 16 | 33 | 45 | 3 |
| 9 | 3 | 17 | 34 | 44 | 3 |
| 10 | 3 | 17 | 35 | 42 | 3 |
| 11 | 3 | 18 | 36 | 40 | 2 |
| 12 | 4 | 19 | 37 | 39 | 2 |
| 13 | 4 | 20 | 38 | 37 | 2 |
| 14 | 5 | 20 | 38 | 35 | 2 |
| 15 | 5 | 22 | 39 | 33 | 1 |
| 16 | 6 | 23 | 40 | 30 | 1 |
| 17 | 7 | 24 | 40 | 28 | 1 |
| 18 | 7 | 25 | 40 | 26 | 1 |
| 19 | 8 | 27 | 41 | 24 | 1 |
| 20 | 9 | 29 | 41 | 21 | 0 |
| 21 | 10 | 30 | 40 | 19 | 0 |
| 22 | 11 | 32 | 40 | 17 | 0 |
| 23 | 13 | 33 | 39 | 15 | 0 |
| 24 | 14 | 35 | 38 | 13 | 0 |
| 25 | 16 | 36 | 36 | 12 | 0 |
| 26 | 17 | 37 | 35 | 10 | 0 |
| 27 | 19 | 38 | 34 | 9 | 0 |
| 28 | 21 | 39 | 32 | 8 | 0 |
| 29 | 23 | 40 | 31 | 7 | 0 |
| 30 | 25 | 40 | 29 | 6 | 0 |
Wind in September
Winds average 5 km/h in September.
Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 5 | calm |
| 2 | 5 | calm |
| 3 | 5 | calm |
| 4 | 5 | calm |
| 5 | 5 | calm |
| 6 | 5 | calm |
| 7 | 5 | calm |
| 8 | 5 | calm |
| 9 | 5 | calm |
| 10 | 5 | calm |
| 11 | 5 | calm |
| 12 | 5 | calm |
| 13 | 5 | calm |
| 14 | 5 | calm |
| 15 | 5 | calm |
| 16 | 5 | calm |
| 17 | 5 | calm |
| 18 | 5 | calm |
| 19 | 5 | calm |
| 20 | 5 | calm |
| 21 | 5 | calm |
| 22 | 5 | calm |
| 23 | 5 | calm |
| 24 | 5 | calm |
| 25 | 5 | calm |
| 26 | 5 | calm |
| 27 | 5 | calm |
| 28 | 5 | calm |
| 29 | 5 | calm |
| 30 | 5 | calm |
Sunrise & sunset in September
Daylight runs from about 12 h 48 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 66 minutes over September. Sunrise moves from 5:34 AM to 5:57 AM, and sunset from 6:22 PM to 5:38 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.8 | 12.8 | 12.7 | 12.7 | 12.7 | 12.6 | 12.6 | 12.5 | 12.5 | 12.5 | 12.4 | 12.4 | 12.3 | 12.3 | 12.3 | 12.2 | 12.2 | 12.1 | 12.1 | 12.1 | 12.0 | 12.0 | 12.0 | 11.9 | 11.9 | 11.8 | 11.8 | 11.8 | 11.7 | 11.7 |
| Sunrise (AM) | 5:34 | 5:34 | 5:35 | 5:36 | 5:37 | 5:38 | 5:38 | 5:39 | 5:40 | 5:41 | 5:42 | 5:42 | 5:43 | 5:44 | 5:45 | 5:46 | 5:46 | 5:47 | 5:48 | 5:49 | 5:50 | 5:51 | 5:51 | 5:52 | 5:53 | 5:54 | 5:55 | 5:55 | 5:56 | 5:57 |
| Sunset (PM) | 6:22 | 6:21 | 6:19 | 6:18 | 6:16 | 6:15 | 6:13 | 6:12 | 6:10 | 6:08 | 6:07 | 6:05 | 6:04 | 6:02 | 6:01 | 5:59 | 5:58 | 5:56 | 5:55 | 5:53 | 5:51 | 5:50 | 5:48 | 5:47 | 5:45 | 5:44 | 5:42 | 5:41 | 5:39 | 5:38 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.8 | 5:34 | 6:22 |
| 2 | 12.8 | 5:34 | 6:21 |
| 3 | 12.7 | 5:35 | 6:19 |
| 4 | 12.7 | 5:36 | 6:18 |
| 5 | 12.7 | 5:37 | 6:16 |
| 6 | 12.6 | 5:38 | 6:15 |
| 7 | 12.6 | 5:38 | 6:13 |
| 8 | 12.5 | 5:39 | 6:12 |
| 9 | 12.5 | 5:40 | 6:10 |
| 10 | 12.5 | 5:41 | 6:08 |
| 11 | 12.4 | 5:42 | 6:07 |
| 12 | 12.4 | 5:42 | 6:05 |
| 13 | 12.3 | 5:43 | 6:04 |
| 14 | 12.3 | 5:44 | 6:02 |
| 15 | 12.3 | 5:45 | 6:01 |
| 16 | 12.2 | 5:46 | 5:59 |
| 17 | 12.2 | 5:46 | 5:58 |
| 18 | 12.1 | 5:47 | 5:56 |
| 19 | 12.1 | 5:48 | 5:55 |
| 20 | 12.1 | 5:49 | 5:53 |
| 21 | 12.0 | 5:50 | 5:51 |
| 22 | 12.0 | 5:51 | 5:50 |
| 23 | 12.0 | 5:51 | 5:48 |
| 24 | 11.9 | 5:52 | 5:47 |
| 25 | 11.9 | 5:53 | 5:45 |
| 26 | 11.8 | 5:54 | 5:44 |
| 27 | 11.8 | 5:55 | 5:42 |
| 28 | 11.8 | 5:55 | 5:41 |
| 29 | 11.7 | 5:56 | 5:39 |
| 30 | 11.7 | 5:57 | 5:38 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 4.34 kWh/m².
For context, solar energy here swings from a low near 2.45 kWh/m² to a high of 5.67 kWh/m² in June across the year — September's 4.34 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.9 | 4.9 | 4.8 | 4.8 | 4.7 | 4.7 | 4.6 | 4.6 | 4.5 | 4.5 | 4.5 | 4.4 | 4.4 | 4.3 | 4.3 | 4.3 | 4.2 | 4.2 | 4.2 | 4.2 | 4.1 | 4.1 | 4.1 | 4.1 | 4.0 | 4.0 | 4.0 | 4.0 | 3.9 | 3.9 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Moderate | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.9 | Bright |
| 2 | 4.9 | Bright |
| 3 | 4.8 | Bright |
| 4 | 4.8 | Bright |
| 5 | 4.7 | Bright |
| 6 | 4.7 | Bright |
| 7 | 4.6 | Bright |
| 8 | 4.6 | Bright |
| 9 | 4.5 | Bright |
| 10 | 4.5 | Bright |
| 11 | 4.5 | Bright |
| 12 | 4.4 | Bright |
| 13 | 4.4 | Bright |
| 14 | 4.3 | Bright |
| 15 | 4.3 | Bright |
| 16 | 4.3 | Bright |
| 17 | 4.2 | Bright |
| 18 | 4.2 | Bright |
| 19 | 4.2 | Bright |
| 20 | 4.2 | Bright |
| 21 | 4.1 | Bright |
| 22 | 4.1 | Bright |
| 23 | 4.1 | Bright |
| 24 | 4.1 | Bright |
| 25 | 4.0 | Bright |
| 26 | 4.0 | Bright |
| 27 | 4.0 | Moderate |
| 28 | 4.0 | Moderate |
| 29 | 3.9 | Moderate |
| 30 | 3.9 | Moderate |
Is September a good time to visit Zīr Āb?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is a reasonable time to visit Zīr Āb for sightseeing.
What to pack for Zīr Āb in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Zīr Āb sees daytime highs around 24°C and nights near 16°C. Pack rain gear. Worth having: light clothes. About 14 days see rain.
UV index in Zīr Āb in September
Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Zīr Āb peaks around July 21 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 12 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 5 | 5 | 8 | 10 | 9 | 11 | 10 | 8 | 6 | 4 | 3 |
| Level | Moderate | Moderate | High | Very high | Very high | Very high | Extreme | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 5 | Moderate |
| Mar | 5 | High |
| Apr | 8 | Very high |
| May | 10 | Very high |
| Jun | 9 | Very high |
| Jul | 11 | Extreme |
| Aug | 10 | Extreme |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Air quality in Zīr Āb in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.
Air quality in Zīr Āb is worst in December — around 45 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (July, 22 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) | 43 | 41 | 39 | 38 | 33 | 25 | 22 | 24 | 31 | 36 | 41 | 45 |
| Level | Poor | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Poor | Poor | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 43 | Poor |
| Feb | 41 | Poor |
| Mar | 39 | Poor |
| Apr | 38 | Poor |
| May | 33 | Moderate |
| Jun | 25 | Moderate |
| Jul | 22 | Moderate |
| Aug | 24 | Moderate |
| Sep | 31 | Moderate |
| Oct | 36 | Poor |
| Nov | 41 | Poor |
| Dec | 45 | Poor |
Where is Zīr Āb?
Zīr Āb sits at 36.2°N, 53.0°E, 398 m above sea level, in Iran. The nearest listed city is Qā’em Shahr, 33 km away.
Topography around Zīr Āb
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Zīr Āb.
Within 3 km, the terrain around Zīr Āb has large variations in elevation — a maximum elevation change of 760 m around an average of 648 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,045 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,024 m.
The land around Zīr Āb is covered by trees (81%) within 3 km, trees (89%) within 16 km, and trees (32%) and grassland (32%) 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 Zīr Āb (36.1797°, 52.9735°, elevation 398 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).