Jiayuguan weather in September

In September, Jiayuguan sees average daytime highs of 20°C and overnight lows near 9°C, with 18 mm of rain across 3.5 wet days and about 12.3 hours of daylight. It is the 5th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 18°C by the end. The sky is clear or mostly clear about 56% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Jiayuguan's 3rd-clearest and 7th-windiest month. For the whole year in context, see Jiayuguan's year-round climate.

Daytime high: 20°; 5th warmest
Overnight low: 9°; 9th coldest
Rainfall: 18 mm; 3.5 wet days
Daylight: 12 h 18 min; 7:13 AM – 7:29 PM
Cloud cover: 40%; 3rd clearest
Wind: 9 km/h; 7th windiest
Solar energy: 5.17 kWh/m²
Travel score: 7.6; out of 10

Jiayuguan is prefecture-level city in Gansu, China.

Air quality: High; PM2.5 25.9 µg/m³ · 2019
Density: 189/km²; people per km²
Founded: 1965

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

← August Jiayuguan 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 23°C in the first days to 18°C by the end.

A typical September day in Jiayuguan reaches about 20°C in the afternoon and slips back to 9°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 25°C. Set against its neighbours, September runs about 5°C cooler than August and about 7°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)	23	23	23	22	22	22	22	22	21	21	21	21	21	21	20	20	20	20	20	19	19	19	19	19	19	18	18	18	18	17
Avg low (°C)	12	12	12	12	11	11	11	11	11	10	10	10	10	9	9	9	9	9	8	8	8	8	8	7	7	7	7	7	6	6

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

How September really feels in Jiayuguan

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.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Jiayuguan 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	-3° / -13°	3	1.1	1.7	9.5	0.0
Feb	1° / -10°	3	1.1	1.5	10.4	0.0
Mar	8° / -4°	10	2.3	2.2	11.7	1.6
Apr	15° / 3°	9	2.3	0.8	13	5.7
May	21° / 9°	15	3.9	0.2	14.2	7.4
Jun	25° / 14°	20	4.2	0	14.8	7.8
Jul	27° / 16°	25	5.2	0	14.5	7.5
Aug	25° / 14°	27	5.4	0	13.6	7.8
Sep	20° / 9°	18	3.5	0	12.3	7.6
Oct	14° / 2°	7	1.8	0.6	10.9	4.9
Nov	5° / -5°	5	1.6	1.7	9.8	0.7
Dec	-2° / -11°	4	1.4	1.8	9.2	0.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 32%.

	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 (%)	69	69	68	68	67	67	67	67	67	67	68	68	68	68	68	68	68	68	69	69	69	69	69	69	69	69	69	69	69	70
Cloudier (%)	31	31	32	32	33	33	33	33	33	33	32	32	32	32	32	32	32	32	31	31	31	31	31	31	31	31	31	31	31	30

	Clearer (%)	Cloudier (%)
1	69	31
2	69	31
3	68	32
4	68	32
5	67	33
6	67	33
7	67	33
8	67	33
9	67	33
10	67	33
11	68	32
12	68	32
13	68	32
14	68	32
15	68	32
16	68	32
17	68	32
18	68	32
19	69	31
20	69	31
21	69	31
22	69	31
23	69	31
24	69	31
25	69	31
26	69	31
27	69	31
28	69	31
29	69	31
30	70	30

Chance of precipitation in September

Any precipitation

Jiayuguan gets around 18 mm of rain over 3.5 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 11% and peaks near 14% 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 (%)	14	14	14	14	14	14	13	13	13	13	12	12	11	11	11	10	10	10	10	10	10	10	10	9	9	9	9	9	9	9

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

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 (%)	98	99	99	99	99	99	99	99	99	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100
Comfortable (%)	2	1	1	1	1	1	1	1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

	Dry (%)	Comfortable (%)
1	98	2
2	99	1
3	99	1
4	99	1
5	99	1
6	99	1
7	99	1
8	99	1
9	99	1
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 9 km/h in September.

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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over September. Sunrise moves from 6:59 AM to 7:27 AM, and sunset from 7:54 PM to 7:05 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)	12.9	12.9	12.8	12.8	12.7	12.7	12.7	12.6	12.6	12.5	12.5	12.4	12.4	12.3	12.3	12.3	12.2	12.2	12.1	12.1	12.0	12.0	11.9	11.9	11.9	11.8	11.8	11.7	11.7	11.6
Sunrise (AM)	6:59	7:00	7:01	7:02	7:03	7:04	7:05	7:06	7:07	7:08	7:09	7:10	7:11	7:12	7:12	7:13	7:14	7:15	7:16	7:17	7:18	7:19	7:20	7:21	7:22	7:23	7:24	7:25	7:26	7:27
Sunset (PM)	7:54	7:53	7:51	7:49	7:48	7:46	7:44	7:43	7:41	7:39	7:37	7:36	7:34	7:32	7:31	7:29	7:27	7:25	7:24	7:22	7:20	7:19	7:17	7:15	7:14	7:12	7:10	7:08	7:07	7:05

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.9	6:59	7:54
2	12.9	7:00	7:53
3	12.8	7:01	7:51
4	12.8	7:02	7:49
5	12.7	7:03	7:48
6	12.7	7:04	7:46
7	12.7	7:05	7:44
8	12.6	7:06	7:43
9	12.6	7:07	7:41
10	12.5	7:08	7:39
11	12.5	7:09	7:37
12	12.4	7:10	7:36
13	12.4	7:11	7:34
14	12.3	7:12	7:32
15	12.3	7:12	7:31
16	12.3	7:13	7:29
17	12.2	7:14	7:27
18	12.2	7:15	7:25
19	12.1	7:16	7:24
20	12.1	7:17	7:22
21	12.0	7:18	7:20
22	12.0	7:19	7:19
23	11.9	7:20	7:17
24	11.9	7:21	7:15
25	11.9	7:22	7:14
26	11.8	7:23	7:12
27	11.8	7:24	7:10
28	11.7	7:25	7:08
29	11.7	7:26	7:07
30	11.6	7:27	7:05

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.17 kWh/m².

For context, solar energy here swings from a low near 2.5 kWh/m² to a high of 6.89 kWh/m² in June across the year — September's 5.17 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)	5.7	5.6	5.6	5.5	5.5	5.5	5.4	5.4	5.4	5.3	5.3	5.3	5.2	5.2	5.2	5.2	5.1	5.1	5.1	5.0	5.0	5.0	5.0	4.9	4.9	4.9	4.9	4.8	4.8	4.8
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	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	5.7	Bright
2	5.6	Bright
3	5.6	Bright
4	5.5	Bright
5	5.5	Bright
6	5.5	Bright
7	5.4	Bright
8	5.4	Bright
9	5.4	Bright
10	5.3	Bright
11	5.3	Bright
12	5.3	Bright
13	5.2	Bright
14	5.2	Bright
15	5.2	Bright
16	5.2	Bright
17	5.1	Bright
18	5.1	Bright
19	5.1	Bright
20	5.0	Bright
21	5.0	Bright
22	5.0	Bright
23	5.0	Bright
24	4.9	Bright
25	4.9	Bright
26	4.9	Bright
27	4.9	Bright
28	4.8	Bright
29	4.8	Bright
30	4.8	Bright

Planning a trip in September

Hazard calendar for Jiayuguan

In seasonPeak

In September, Jiayuguan sits inside its dust season. The full year is below, with each hazard's peak months called out.

Jiayuguan sees seasonal dust haze (March–October), heaviest in May.

Dust

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Jiayuguan?

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

7.6

Sightseeing

3rd-best month of the year

4.1

Beach & pool

5th-best month of the year

September is one of the better times to visit Jiayuguan for general sightseeing.

What to pack for Jiayuguan in September

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

In September, Jiayuguan sees daytime highs around 20°C and nights near 9°C. Worth packing: sun protection. About 4 days see rain.

sun protection

UV index in Jiayuguan in September

LowModerateHighVery highExtreme

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 Jiayuguan peaks around July 14 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	2	3	5	7	8	10	11	9	8	4	2	2
Level	Low	Moderate	Moderate	High	Very high	Very high	Extreme	Very high	Very high	Moderate	Moderate	Low

	UV index (midday)	Level
Jan	2	Low
Feb	3	Moderate
Mar	5	Moderate
Apr	7	High
May	8	Very high
Jun	10	Very high
Jul	11	Extreme
Aug	9	Very high
Sep	8	Very high
Oct	4	Moderate
Nov	2	Moderate
Dec	2	Low

Air quality in Jiayuguan 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 Jiayuguan is worst in May — around 39 µg/m³ PM2.5 (poor), about 2.6× the cleanest month (December, 15 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Jiayuguan's WHO annual average of 25.9 µg/m³.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	19	20	37	39	39	25	22	26	22	26	21	15
Level	Moderate	Moderate	Poor	Poor	Poor	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	19	Moderate
Feb	20	Moderate
Mar	37	Poor
Apr	39	Poor
May	39	Poor
Jun	25	Moderate
Jul	22	Moderate
Aug	26	Moderate
Sep	22	Moderate
Oct	26	Moderate
Nov	21	Moderate
Dec	15	Moderate

Location & terrain

Where is Jiayuguan?

Jiayuguan sits at 39.8°N, 98.3°E, 1,635 m above sea level, in China. The nearest listed city is Dunhuang, 309 km away.

Topography around Jiayuguan

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

Within 3 km, the terrain around Jiayuguan has only modest variations in elevation — a maximum elevation change of 90 m around an average of 1,636 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 748 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,337 m.

The land around Jiayuguan is covered by artificial surfaces (57%) and bare terrain (32%) within 3 km, bare terrain (75%) within 16 km, and bare terrain (70%) within 80 km.

3 km

90 m

artificial surfaces 57%

16 km

748 m

bare terrain 75%

80 km

4,337 m

bare terrain 70%

treesshrubsgrasslandcroplandartificial surfacesbare terrainsnow and icewater

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

September weather nearby: Dunhuang 309 km · Bogd 628 km · Hovd 636 km · Dalandzadgad 659 km · Yinchuan 705 km · Bayanhongor 737 km · Altai 748 km · Arvayheer 805 km

China travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type A / I; 220 V · 50 Hz
Prices: ≈ 47% of US; price level, 2025
GDP per capita: $13,862; 2025
Happiness: 6.1 / 10; World Happiness, 2025
Homicide rate: 0.5; per 100k, 2020
Road deaths: 17.4; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Low; EF EPI 464
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 Jiayuguan (39.8112°, 98.2862°, elevation 1,635 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	23	12
2	23	12
3	23	12
4	22	12
5	22	11
6	22	11
7	22	11
8	22	11
9	21	11
10	21	10
11	21	10
12	21	10
13	21	10
14	21	9
15	20	9
16	20	9
17	20	9
18	20	9
19	20	8
20	19	8
21	19	8
22	19	8
23	19	8
24	19	7
25	19	7
26	18	7
27	18	7
28	18	7
29	18	6
30	17	6

	Clearer (%)	Cloudier (%)
1	69	31
2	69	31
3	68	32
4	68	32
5	67	33
6	67	33
7	67	33
8	67	33
9	67	33
10	67	33
11	68	32
12	68	32
13	68	32
14	68	32
15	68	32
16	68	32
17	68	32
18	68	32
19	69	31
20	69	31
21	69	31
22	69	31
23	69	31
24	69	31
25	69	31
26	69	31
27	69	31
28	69	31
29	69	31
30	70	30

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

	Dry (%)	Comfortable (%)
1	98	2
2	99	1
3	99	1
4	99	1
5	99	1
6	99	1
7	99	1
8	99	1
9	99	1
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	23	12
2	23	12
3	23	12
4	22	12
5	22	11
6	22	11
7	22	11
8	22	11
9	21	11
10	21	10
11	21	10
12	21	10
13	21	10
14	21	9
15	20	9
16	20	9
17	20	9
18	20	9
19	20	8
20	19	8
21	19	8
22	19	8
23	19	8
24	19	7
25	19	7
26	18	7
27	18	7
28	18	7
29	18	6
30	17	6

	Clearer (%)	Cloudier (%)
1	69	31
2	69	31
3	68	32
4	68	32
5	67	33
6	67	33
7	67	33
8	67	33
9	67	33
10	67	33
11	68	32
12	68	32
13	68	32
14	68	32
15	68	32
16	68	32
17	68	32
18	68	32
19	69	31
20	69	31
21	69	31
22	69	31
23	69	31
24	69	31
25	69	31
26	69	31
27	69	31
28	69	31
29	69	31
30	70	30

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

	Dry (%)	Comfortable (%)
1	98	2
2	99	1
3	99	1
4	99	1
5	99	1
6	99	1
7	99	1
8	99	1
9	99	1
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	23	12
2	23	12
3	23	12
4	22	12
5	22	11
6	22	11
7	22	11
8	22	11
9	21	11
10	21	10
11	21	10
12	21	10
13	21	10
14	21	9
15	20	9
16	20	9
17	20	9
18	20	9
19	20	8
20	19	8
21	19	8
22	19	8
23	19	8
24	19	7
25	19	7
26	18	7
27	18	7
28	18	7
29	18	6
30	17	6

	Clearer (%)	Cloudier (%)
1	69	31
2	69	31
3	68	32
4	68	32
5	67	33
6	67	33
7	67	33
8	67	33
9	67	33
10	67	33
11	68	32
12	68	32
13	68	32
14	68	32
15	68	32
16	68	32
17	68	32
18	68	32
19	69	31
20	69	31
21	69	31
22	69	31
23	69	31
24	69	31
25	69	31
26	69	31
27	69	31
28	69	31
29	69	31
30	70	30

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

	Dry (%)	Comfortable (%)
1	98	2
2	99	1
3	99	1
4	99	1
5	99	1
6	99	1
7	99	1
8	99	1
9	99	1
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