Mirny weather in September

In September, Mirny sees average daytime highs of 9°C and overnight lows near 1°C, with 35 mm of precipitation across 8.3 wet days and about 12.6 hours of daylight. It is the 5th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 13°C in the first days to 4°C by the end. The sky is clear or mostly clear about 13% of the time in September, and the air most often feels dry.

Daylight stretches from about 14 h 06 min at the start of September to 11 h 06 min by month's end. Set against the rest of the year, September is Mirny's 6th-clearest and 4th-windiest month. For the whole year in context, see Mirny's year-round climate.

Daytime high: 9°; 5th warmest
Overnight low: 1°; 9th coldest
Precipitation: 35 mm; 8.3 wet days
Daylight: 12 h 36 min; 7:01 AM – 7:36 PM
Cloud cover: 76%; 6th clearest
Wind: 10 km/h; 4th windiest
Solar energy: 2.37 kWh/m²
Travel score: 1.8; out of 10

Mirny is town and the administrative center of Mirninsky District of the Sakha Republic, Russia.

Density: 328/km²; people per km²
Founded: 1955

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← August Mirny year-round climate October →Best places to visit in September

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 13°C in the first days to 4°C by the end.

A typical September day in Mirny reaches about 9°C in the afternoon and slips back to 1°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 3°C and 15°C. Set against its neighbours, September runs about 10°C cooler than August and about 12°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)	14	14	14	13	13	12	12	12	11	11	11	10	10	10	9	9	9	8	8	8	7	7	6	6	6	5	5	4	4	3
Avg low (°C)	5	4	4	4	4	3	3	3	3	2	2	2	2	1	1	1	1	0	0	0	0	-1	-1	-1	-2	-2	-2	-2	-3	-3

	Avg high (°C)	Avg low (°C)
1	14	5
2	14	4
3	14	4
4	13	4
5	13	4
6	12	3
7	12	3
8	12	3
9	11	3
10	11	2
11	11	2
12	10	2
13	10	2
14	10	1
15	9	1
16	9	1
17	9	1
18	8	0
19	8	0
20	8	0
21	7	0
22	7	-1
23	6	-1
24	6	-1
25	6	-2
26	5	-2
27	5	-2
28	4	-2
29	4	-3
30	3	-3

How September really feels in Mirny

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 23 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

The story in September is cold — wind chill drags the overnight "feels like" below the raw low.

Mirny weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 4th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	-27° / -33°	5	1.6	3.7	5.6	0.0
Feb	-22° / -30°	4	1.4	2.7	8.2	0.0
Mar	-10° / -22°	8	3.3	4.9	11.3	0.0
Apr	1° / -11°	16	5.1	5.7	14.4	0.0
May	10° / -1°	33	8.2	3	17.4	2.2
Jun	20° / 9°	50	9.6	0.2	19.3	6.1
Jul	22° / 12°	48	8.7	0	18.5	6.8
Aug	19° / 8°	51	8.7	0	15.8	5.9
Sep	9° / 1°	35	8.3	2.6	12.6	1.8
Oct	-3° / -10°	25	7.6	8.5	9.5	0.0
Nov	-18° / -25°	13	4.6	6.6	6.5	0.0
Dec	-27° / -33°	6	2	4.2	4.7	0.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 10% of September, with mostly cloudy or overcast conditions the remaining 77%.

	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 (%)	25	25	25	24	24	24	25	25	24	24	24	24	24	23	24	24	24	24	24	23	23	22	22	20	19	19	19	17	16	16
Cloudier (%)	75	75	75	76	76	76	75	75	76	76	76	76	76	77	76	76	76	76	76	77	77	78	78	80	81	81	81	83	84	84

	Clearer (%)	Cloudier (%)
1	25	75
2	25	75
3	25	75
4	24	76
5	24	76
6	24	76
7	25	75
8	25	75
9	24	76
10	24	76
11	24	76
12	24	76
13	24	76
14	23	77
15	24	76
16	24	76
17	24	76
18	24	76
19	24	76
20	23	77
21	23	77
22	22	78
23	22	78
24	20	80
25	19	81
26	19	81
27	19	81
28	17	83
29	16	84
30	16	84

Chance of precipitation in September

Any precipitationSnow

Mirny gets around 35 mm of rain and snow over 8.3 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 27% and peaks near 29% on the wettest days, and about 3 days bring snow.

	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 (%)	28	29	29	29	29	29	29	29	29	29	29	28	28	28	28	27	27	26	26	26	26	26	26	26	26	26	26	26	26	26
Snow chance (%)	1	1	2	2	2	2	3	3	4	4	5	6	6	7	7	8	9	10	11	11	12	13	14	15	15	16	17	18	19	19

	Rain chance (%)	Snow chance (%)
1	28	1
2	29	1
3	29	2
4	29	2
5	29	2
6	29	2
7	29	3
8	29	3
9	29	4
10	29	4
11	29	5
12	28	6
13	28	6
14	28	7
15	28	7
16	27	8
17	27	9
18	26	10
19	26	11
20	26	11
21	26	12
22	26	13
23	26	14
24	26	15
25	26	15
26	26	16
27	26	17
28	26	18
29	26	19
30	26	19

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

	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 (%)	99	99	99	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100
Comfortable (%)	1	1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

	Dry (%)	Comfortable (%)
1	99	1
2	99	1
3	99	1
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 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)	10	10	10	10	10	10	10	10	10	10	10	11	10	10	10	10	10	10	10	10	10	10	11	11	11	11	11	11	11	11
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	10	calm
2	10	calm
3	10	calm
4	10	calm
5	10	calm
6	10	calm
7	10	calm
8	10	calm
9	10	calm
10	10	calm
11	10	calm
12	11	calm
13	10	calm
14	10	calm
15	10	calm
16	10	calm
17	10	calm
18	10	calm
19	10	calm
20	10	calm
21	10	calm
22	10	calm
23	11	calm
24	11	calm
25	11	calm
26	11	calm
27	11	calm
28	11	calm
29	11	calm
30	11	calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 14 h 06 min at the start of September to 11 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 180 minutes over September. Sunrise moves from 6:20 AM to 7:39 AM, and sunset from 8:28 PM to 6:48 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)	14.1	14.0	13.9	13.8	13.7	13.6	13.5	13.4	13.3	13.2	13.1	13.0	12.9	12.8	12.7	12.6	12.5	12.4	12.3	12.2	12.1	12.0	11.9	11.8	11.7	11.6	11.5	11.4	11.2	11.1
Sunrise (AM)	6:20	6:22	6:25	6:28	6:31	6:33	6:36	6:39	6:41	6:44	6:47	6:50	6:52	6:55	6:58	7:01	7:03	7:06	7:09	7:12	7:14	7:17	7:20	7:23	7:25	7:28	7:31	7:34	7:36	7:39
Sunset (PM)	8:28	8:25	8:21	8:18	8:14	8:11	8:08	8:04	8:01	7:57	7:54	7:50	7:47	7:43	7:40	7:36	7:33	7:29	7:26	7:22	7:19	7:15	7:12	7:09	7:05	7:02	6:58	6:55	6:51	6:48

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	14.1	6:20	8:28
2	14.0	6:22	8:25
3	13.9	6:25	8:21
4	13.8	6:28	8:18
5	13.7	6:31	8:14
6	13.6	6:33	8:11
7	13.5	6:36	8:08
8	13.4	6:39	8:04
9	13.3	6:41	8:01
10	13.2	6:44	7:57
11	13.1	6:47	7:54
12	13.0	6:50	7:50
13	12.9	6:52	7:47
14	12.8	6:55	7:43
15	12.7	6:58	7:40
16	12.6	7:01	7:36
17	12.5	7:03	7:33
18	12.4	7:06	7:29
19	12.3	7:09	7:26
20	12.2	7:12	7:22
21	12.1	7:14	7:19
22	12.0	7:17	7:15
23	11.9	7:20	7:12
24	11.8	7:23	7:09
25	11.7	7:25	7:05
26	11.6	7:28	7:02
27	11.5	7:31	6:58
28	11.4	7:34	6:55
29	11.2	7:36	6:51
30	11.1	7:39	6:48

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.37 kWh/m².

For context, solar energy here swings from a low near 0.12 kWh/m² to a high of 5.88 kWh/m² in June across the year — September's 2.37 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)	3.1	3.0	3.0	2.9	2.9	2.8	2.8	2.7	2.7	2.6	2.6	2.5	2.5	2.4	2.4	2.4	2.3	2.3	2.2	2.2	2.1	2.1	2.0	2.0	1.9	1.9	1.9	1.8	1.8	1.7
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Dim	Dim	Dim	Dim	Dim	Dim

	Solar energy (kWh/m²)	Level
1	3.1	Moderate
2	3.0	Moderate
3	3.0	Moderate
4	2.9	Moderate
5	2.9	Moderate
6	2.8	Moderate
7	2.8	Moderate
8	2.7	Moderate
9	2.7	Moderate
10	2.6	Moderate
11	2.6	Moderate
12	2.5	Moderate
13	2.5	Moderate
14	2.4	Moderate
15	2.4	Moderate
16	2.4	Moderate
17	2.3	Moderate
18	2.3	Moderate
19	2.2	Moderate
20	2.2	Moderate
21	2.1	Moderate
22	2.1	Moderate
23	2.0	Moderate
24	2.0	Moderate
25	1.9	Dim
26	1.9	Dim
27	1.9	Dim
28	1.8	Dim
29	1.8	Dim
30	1.7	Dim

Planning a trip in September

Is September a good time to visit Mirny?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

1.8

Sightseeing

5th-best month of the year

0.0

Beach & pool

5th-best month of the year

September is a weaker month for outdoor sightseeing in Mirny.

What to pack for Mirny in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Mirny sees daytime highs around 9°C and nights near 1°C. Pack a warm layer. Worth having: rain gear. About 8 days see rain.

a warm layerrain gear

UV index in Mirny in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mirny peaks around May 23 at about 4 (moderate) — a little sun protection helps at midday. It bottoms out near January 1 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 4 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	0	0	1	3	4	4	3	4	2	1	0	0
Level	Low	Low	Low	Moderate	Moderate	Moderate	Moderate	Moderate	Low	Low	Low	Low

	UV index (midday)	Level
Jan	0	Low
Feb	0	Low
Mar	1	Low
Apr	3	Moderate
May	4	Moderate
Jun	4	Moderate
Jul	3	Moderate
Aug	4	Moderate
Sep	2	Low
Oct	1	Low
Nov	0	Low
Dec	0	Low

Air quality in Mirny in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Mirny is worst in July — around 53 µg/m³ PM2.5 (poor), about 58.9× the cleanest month (December, 1 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)	1	2	5	8	8	13	53	44	15	7	2	1
Level	Good	Good	Good	Good	Good	Moderate	Poor	Poor	Moderate	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	1	Good
Feb	2	Good
Mar	5	Good
Apr	8	Good
May	8	Good
Jun	13	Moderate
Jul	53	Poor
Aug	44	Poor
Sep	15	Moderate
Oct	7	Good
Nov	2	Good
Dec	1	Good

Location & terrain

Where is Mirny?

Mirny sits at 62.5°N, 114.0°E, 352 m above sea level, in Russia. The nearest listed city is Lensk, 208 km away.

Topography around Mirny

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Mirny.

Within 3 km, the terrain around Mirny has significant variations in elevation — a maximum elevation change of 527 m around an average of 336 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 562 m; within 80 km, significant variations in elevation — a maximum elevation change of 563 m.

The land around Mirny is covered by trees (42%), artificial surfaces (25%) and bare terrain (22%) within 3 km, trees (90%) within 16 km, and trees (92%) within 80 km.

3 km

527 m

trees 42%

16 km

562 m

trees 90%

80 km

563 m

trees 92%

treesgrasslandartificial surfacesbare terrainwatermoss and lichen

← August Mirny year-round climate October →Best places to visit in September

September weather nearby: Lensk 208 km · Aykhal 396 km · Udachny 439 km · Bodaybo 521 km · Aldan 760 km · Ust’-Kut 785 km · Ust’-Ilimsk 800 km · Severobaykal’sk 811 km

Russia travel facts

Travel advisory: Level 4; Do Not Travel
Power plugs: Type C / F; 230 V · 50 Hz
Prices: ≈ 32% of US; price level, 2025
GDP per capita: $17,547; 2025
Happiness: 5.8 / 10; World Happiness, 2025
Safe drinking water: 76%; of population, 2024
Homicide rate: 6.8; per 100k, 2021
Road deaths: 12; per 100k/yr, 2019
Income group: High; World Bank
English: Moderate; EF EPI 521
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 Mirny (62.5353°, 113.9611°, elevation 352 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).

	Avg high (°C)	Avg low (°C)
1	14	5
2	14	4
3	14	4
4	13	4
5	13	4
6	12	3
7	12	3
8	12	3
9	11	3
10	11	2
11	11	2
12	10	2
13	10	2
14	10	1
15	9	1
16	9	1
17	9	1
18	8	0
19	8	0
20	8	0
21	7	0
22	7	-1
23	6	-1
24	6	-1
25	6	-2
26	5	-2
27	5	-2
28	4	-2
29	4	-3
30	3	-3

	Clearer (%)	Cloudier (%)
1	25	75
2	25	75
3	25	75
4	24	76
5	24	76
6	24	76
7	25	75
8	25	75
9	24	76
10	24	76
11	24	76
12	24	76
13	24	76
14	23	77
15	24	76
16	24	76
17	24	76
18	24	76
19	24	76
20	23	77
21	23	77
22	22	78
23	22	78
24	20	80
25	19	81
26	19	81
27	19	81
28	17	83
29	16	84
30	16	84

	Rain chance (%)	Snow chance (%)
1	28	1
2	29	1
3	29	2
4	29	2
5	29	2
6	29	2
7	29	3
8	29	3
9	29	4
10	29	4
11	29	5
12	28	6
13	28	6
14	28	7
15	28	7
16	27	8
17	27	9
18	26	10
19	26	11
20	26	11
21	26	12
22	26	13
23	26	14
24	26	15
25	26	15
26	26	16
27	26	17
28	26	18
29	26	19
30	26	19

	Dry (%)	Comfortable (%)
1	99	1
2	99	1
3	99	1
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0

	Avg high (°C)	Avg low (°C)
1	14	5
2	14	4
3	14	4
4	13	4
5	13	4
6	12	3
7	12	3
8	12	3
9	11	3
10	11	2
11	11	2
12	10	2
13	10	2
14	10	1
15	9	1
16	9	1
17	9	1
18	8	0
19	8	0
20	8	0
21	7	0
22	7	-1
23	6	-1
24	6	-1
25	6	-2
26	5	-2
27	5	-2
28	4	-2
29	4	-3
30	3	-3

	Clearer (%)	Cloudier (%)
1	25	75
2	25	75
3	25	75
4	24	76
5	24	76
6	24	76
7	25	75
8	25	75
9	24	76
10	24	76
11	24	76
12	24	76
13	24	76
14	23	77
15	24	76
16	24	76
17	24	76
18	24	76
19	24	76
20	23	77
21	23	77
22	22	78
23	22	78
24	20	80
25	19	81
26	19	81
27	19	81
28	17	83
29	16	84
30	16	84

	Rain chance (%)	Snow chance (%)
1	28	1
2	29	1
3	29	2
4	29	2
5	29	2
6	29	2
7	29	3
8	29	3
9	29	4
10	29	4
11	29	5
12	28	6
13	28	6
14	28	7
15	28	7
16	27	8
17	27	9
18	26	10
19	26	11
20	26	11
21	26	12
22	26	13
23	26	14
24	26	15
25	26	15
26	26	16
27	26	17
28	26	18
29	26	19
30	26	19

	Dry (%)	Comfortable (%)
1	99	1
2	99	1
3	99	1
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0

	Avg high (°C)	Avg low (°C)
1	14	5
2	14	4
3	14	4
4	13	4
5	13	4
6	12	3
7	12	3
8	12	3
9	11	3
10	11	2
11	11	2
12	10	2
13	10	2
14	10	1
15	9	1
16	9	1
17	9	1
18	8	0
19	8	0
20	8	0
21	7	0
22	7	-1
23	6	-1
24	6	-1
25	6	-2
26	5	-2
27	5	-2
28	4	-2
29	4	-3
30	3	-3

	Clearer (%)	Cloudier (%)
1	25	75
2	25	75
3	25	75
4	24	76
5	24	76
6	24	76
7	25	75
8	25	75
9	24	76
10	24	76
11	24	76
12	24	76
13	24	76
14	23	77
15	24	76
16	24	76
17	24	76
18	24	76
19	24	76
20	23	77
21	23	77
22	22	78
23	22	78
24	20	80
25	19	81
26	19	81
27	19	81
28	17	83
29	16	84
30	16	84

	Rain chance (%)	Snow chance (%)
1	28	1
2	29	1
3	29	2
4	29	2
5	29	2
6	29	2
7	29	3
8	29	3
9	29	4
10	29	4
11	29	5
12	28	6
13	28	6
14	28	7
15	28	7
16	27	8
17	27	9
18	26	10
19	26	11
20	26	11
21	26	12
22	26	13
23	26	14
24	26	15
25	26	15
26	26	16
27	26	17
28	26	18
29	26	19
30	26	19

	Dry (%)	Comfortable (%)
1	99	1
2	99	1
3	99	1
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0