Udachny weather in September

In September, Udachny sees average daytime highs of 6°C and overnight lows near -1°C, with 41 mm of precipitation across 9.4 wet days and about 12.8 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 11°C in the first days to 1°C by the end. The sky is clear or mostly clear about 9% of the time in September, and the air most often feels dry.

Daylight stretches from about 14 h 36 min at the start of September to 11 hours by month's end. Set against the rest of the year, September is Udachny's 8th-clearest and 5th-windiest month. For the whole year in context, see Udachny's year-round climate.

Daytime high: 6°; 4th warmest
Overnight low: -1°; 9th coldest
Precipitation: 41 mm; 9.4 wet days
Daylight: 12 h 42 min; 7:03 AM – 7:46 PM
Cloud cover: 80%; 8th clearest
Wind: 10 km/h; 5th windiest
Solar energy: 1.92 kWh/m²
Travel score: 0.8; out of 10

Udachny is town in Mirninsky District, Sakha Republic, Russia.

Density: 7,633/km²; people per km²
Founded: 1967

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

← August Udachny 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 11°C in the first days to 1°C by the end.

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

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

How September really feels in Udachny

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 28 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

1 feel bitter (≤ -10°C)

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

Udachny weather by month

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

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	-30° / -37°	3	0.9	2.1	3.6	0.0
Feb	-26° / -34°	3	0.8	2	7.4	0.0
Mar	-15° / -26°	6	2.1	3.7	11.1	0.0
Apr	-3° / -14°	20	5.6	6.7	14.9	0.0
May	6° / -4°	42	9.6	7.1	18.8	0.7
Jun	16° / 6°	54	10.8	1	22.4	4.7
Jul	20° / 10°	59	9.3	0	20.6	6.2
Aug	16° / 6°	56	10.2	0.3	16.6	4.7
Sep	6° / -1°	41	9.4	4.4	12.8	0.8
Oct	-7° / -14°	22	6.1	8	9	0.0
Nov	-22° / -29°	8	2.5	4.7	5.1	0.0
Dec	-29° / -36°	3	1.2	2.4	1.6	0.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 9% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 8% of September, with mostly cloudy or overcast conditions the remaining 82%.

	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 (%)	17	17	17	17	18	18	17	17	17	17	17	17	17	19	19	19	19	19	20	19	19	19	19	17	17	17	17	16	16	15
Cloudier (%)	83	83	83	83	82	82	83	83	83	83	83	83	83	81	81	81	81	81	80	81	81	81	81	83	83	83	83	84	84	85

	Clearer (%)	Cloudier (%)
1	17	83
2	17	83
3	17	83
4	17	83
5	18	82
6	18	82
7	17	83
8	17	83
9	17	83
10	17	83
11	17	83
12	17	83
13	17	83
14	19	81
15	19	81
16	19	81
17	19	81
18	19	81
19	20	80
20	19	81
21	19	81
22	19	81
23	19	81
24	17	83
25	17	83
26	17	83
27	17	83
28	16	84
29	16	84
30	15	85

Chance of precipitation in September

Any precipitationSnow

Udachny gets around 41 mm of rain and snow over 9.4 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 31% and peaks near 37% on the wettest days, and about 4 days bring snow. The odds ease toward the end of the month.

	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 (%)	36	36	37	37	37	37	37	36	36	36	35	34	34	33	32	31	31	30	29	28	27	27	26	26	25	25	25	25	24	24
Snow chance (%)	4	5	6	6	7	8	9	10	11	12	12	13	14	14	15	16	16	17	17	18	19	19	20	20	21	22	22	23	24	25

	Rain chance (%)	Snow chance (%)
1	36	4
2	36	5
3	37	6
4	37	6
5	37	7
6	37	8
7	37	9
8	36	10
9	36	11
10	36	12
11	35	12
12	34	13
13	34	14
14	33	14
15	32	15
16	31	16
17	31	16
18	30	17
19	29	17
20	28	18
21	27	19
22	27	19
23	26	20
24	26	20
25	25	21
26	25	22
27	25	22
28	25	23
29	24	24
30	24	25

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 (%)	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	100	100	100

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

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 10 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	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10
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	10	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	10	calm
24	10	calm
25	10	calm
26	10	calm
27	10	calm
28	10	calm
29	10	calm
30	10	calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 14 h 36 min at the start of September to 11 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 216 minutes over September. Sunrise moves from 6:13 AM to 7:50 AM, and sunset from 8:47 PM to 6:49 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)	14.6	14.4	14.3	14.2	14.1	13.9	13.8	13.7	13.6	13.5	13.3	13.2	13.1	13.0	12.8	12.7	12.6	12.5	12.3	12.2	12.1	12.0	11.8	11.7	11.6	11.5	11.4	11.2	11.1	11.0
Sunrise (AM)	6:13	6:16	6:20	6:23	6:27	6:30	6:33	6:37	6:40	6:43	6:47	6:50	6:53	6:57	7:00	7:03	7:07	7:10	7:13	7:17	7:20	7:23	7:27	7:30	7:33	7:37	7:40	7:44	7:47	7:50
Sunset (PM)	8:47	8:43	8:39	8:35	8:31	8:27	8:23	8:19	8:15	8:10	8:06	8:02	7:58	7:54	7:50	7:46	7:42	7:38	7:34	7:30	7:26	7:22	7:18	7:13	7:09	7:05	7:01	6:57	6:53	6:49

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	14.6	6:13	8:47
2	14.4	6:16	8:43
3	14.3	6:20	8:39
4	14.2	6:23	8:35
5	14.1	6:27	8:31
6	13.9	6:30	8:27
7	13.8	6:33	8:23
8	13.7	6:37	8:19
9	13.6	6:40	8:15
10	13.5	6:43	8:10
11	13.3	6:47	8:06
12	13.2	6:50	8:02
13	13.1	6:53	7:58
14	13.0	6:57	7:54
15	12.8	7:00	7:50
16	12.7	7:03	7:46
17	12.6	7:07	7:42
18	12.5	7:10	7:38
19	12.3	7:13	7:34
20	12.2	7:17	7:30
21	12.1	7:20	7:26
22	12.0	7:23	7:22
23	11.8	7:27	7:18
24	11.7	7:30	7:13
25	11.6	7:33	7:09
26	11.5	7:37	7:05
27	11.4	7:40	7:01
28	11.2	7:44	6:57
29	11.1	7:47	6:53
30	11.0	7:50	6:49

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 1.92 kWh/m².

For context, solar energy here swings from a low near 0.01 kWh/m² to a high of 5.52 kWh/m² in June across the year — September's 1.92 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)	2.5	2.5	2.4	2.4	2.3	2.3	2.2	2.2	2.2	2.1	2.1	2.0	2.0	2.0	1.9	1.9	1.9	1.8	1.8	1.8	1.7	1.7	1.7	1.6	1.6	1.6	1.5	1.5	1.4	1.4
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim

	Solar energy (kWh/m²)	Level
1	2.5	Moderate
2	2.5	Moderate
3	2.4	Moderate
4	2.4	Moderate
5	2.3	Moderate
6	2.3	Moderate
7	2.2	Moderate
8	2.2	Moderate
9	2.2	Moderate
10	2.1	Moderate
11	2.1	Moderate
12	2.0	Moderate
13	2.0	Moderate
14	2.0	Dim
15	1.9	Dim
16	1.9	Dim
17	1.9	Dim
18	1.8	Dim
19	1.8	Dim
20	1.8	Dim
21	1.7	Dim
22	1.7	Dim
23	1.7	Dim
24	1.6	Dim
25	1.6	Dim
26	1.6	Dim
27	1.5	Dim
28	1.5	Dim
29	1.4	Dim
30	1.4	Dim

Planning a trip in September

Is September a good time to visit Udachny?

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

0.8

Sightseeing

4th-best month of the year

0.0

Beach & pool

5th-best month of the year

September is a weaker month for outdoor sightseeing in Udachny.

What to pack for Udachny in September

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

In September, Udachny sees daytime highs around 6°C and nights near -1°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 9 days see rain.

a warm layera heavy coatrain gear

UV index in Udachny 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 Udachny peaks around July 16 at about 5 (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	2	4	4	5	3	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	2	Moderate
May	4	Moderate
Jun	4	Moderate
Jul	5	Moderate
Aug	3	Moderate
Sep	2	Low
Oct	1	Low
Nov	0	Low
Dec	0	Low

Air quality in Udachny 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 Udachny is worst in August — around 16 µg/m³ PM2.5 (moderate), about 32.8× 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	1	3	4	5	8	14	16	6	2	1	1
Level	Good	Good	Good	Good	Good	Good	Moderate	Moderate	Good	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	1	Good
Feb	1	Good
Mar	3	Good
Apr	4	Good
May	5	Good
Jun	8	Good
Jul	14	Moderate
Aug	16	Moderate
Sep	6	Good
Oct	2	Good
Nov	1	Good
Dec	1	Good

Location & terrain

Where is Udachny?

Udachny sits at 66.4°N, 112.4°E, 315 m above sea level, in Russia. The nearest listed city is Aykhal, 69 km away.

Topography around Udachny

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

Within 3 km, the terrain around Udachny has significant variations in elevation — a maximum elevation change of 253 m around an average of 333 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 386 m; within 80 km, significant variations in elevation — a maximum elevation change of 593 m.

The land around Udachny is covered by trees (68%) within 3 km, trees (92%) within 16 km, and trees (97%) within 80 km.

3 km

253 m

trees 68%

16 km

386 m

trees 92%

80 km

593 m

trees 97%

treesgrasslandbare terrainwatermoss and lichen

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

September weather nearby: Aykhal 69 km · Mirny 439 km · Lensk 647 km · Bodaybo 958 km · Yakutsk 965 km · Talnakh 1,050 km · Norilsk 1,055 km · Ust’-Ilimsk 1,062 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 Udachny (66.4299°, 112.4021°, elevation 315 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	11	3
2	11	3
3	11	3
4	10	2
5	10	2
6	9	2
7	9	1
8	9	1
9	8	1
10	8	1
11	8	0
12	7	0
13	7	0
14	7	0
15	7	-1
16	6	-1
17	6	-1
18	5	-1
19	5	-2
20	5	-2
21	4	-2
22	4	-3
23	4	-3
24	3	-3
25	3	-4
26	2	-4
27	2	-4
28	1	-5
29	1	-5
30	1	-6

	Clearer (%)	Cloudier (%)
1	17	83
2	17	83
3	17	83
4	17	83
5	18	82
6	18	82
7	17	83
8	17	83
9	17	83
10	17	83
11	17	83
12	17	83
13	17	83
14	19	81
15	19	81
16	19	81
17	19	81
18	19	81
19	20	80
20	19	81
21	19	81
22	19	81
23	19	81
24	17	83
25	17	83
26	17	83
27	17	83
28	16	84
29	16	84
30	15	85

	Rain chance (%)	Snow chance (%)
1	36	4
2	36	5
3	37	6
4	37	6
5	37	7
6	37	8
7	37	9
8	36	10
9	36	11
10	36	12
11	35	12
12	34	13
13	34	14
14	33	14
15	32	15
16	31	16
17	31	16
18	30	17
19	29	17
20	28	18
21	27	19
22	27	19
23	26	20
24	26	20
25	25	21
26	25	22
27	25	22
28	25	23
29	24	24
30	24	25

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

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

	Clearer (%)	Cloudier (%)
1	17	83
2	17	83
3	17	83
4	17	83
5	18	82
6	18	82
7	17	83
8	17	83
9	17	83
10	17	83
11	17	83
12	17	83
13	17	83
14	19	81
15	19	81
16	19	81
17	19	81
18	19	81
19	20	80
20	19	81
21	19	81
22	19	81
23	19	81
24	17	83
25	17	83
26	17	83
27	17	83
28	16	84
29	16	84
30	15	85

	Rain chance (%)	Snow chance (%)
1	36	4
2	36	5
3	37	6
4	37	6
5	37	7
6	37	8
7	37	9
8	36	10
9	36	11
10	36	12
11	35	12
12	34	13
13	34	14
14	33	14
15	32	15
16	31	16
17	31	16
18	30	17
19	29	17
20	28	18
21	27	19
22	27	19
23	26	20
24	26	20
25	25	21
26	25	22
27	25	22
28	25	23
29	24	24
30	24	25

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

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

	Clearer (%)	Cloudier (%)
1	17	83
2	17	83
3	17	83
4	17	83
5	18	82
6	18	82
7	17	83
8	17	83
9	17	83
10	17	83
11	17	83
12	17	83
13	17	83
14	19	81
15	19	81
16	19	81
17	19	81
18	19	81
19	20	80
20	19	81
21	19	81
22	19	81
23	19	81
24	17	83
25	17	83
26	17	83
27	17	83
28	16	84
29	16	84
30	15	85

	Rain chance (%)	Snow chance (%)
1	36	4
2	36	5
3	37	6
4	37	6
5	37	7
6	37	8
7	37	9
8	36	10
9	36	11
10	36	12
11	35	12
12	34	13
13	34	14
14	33	14
15	32	15
16	31	16
17	31	16
18	30	17
19	29	17
20	28	18
21	27	19
22	27	19
23	26	20
24	26	20
25	25	21
26	25	22
27	25	22
28	25	23
29	24	24
30	24	25

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