Thị Trấn Đại Từ weather in September

In September, Thị Trấn Đại Từ sees average daytime highs of 31°C and overnight lows near 24°C, with 206 mm of rain across 17.8 wet days and about 12.1 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 21% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 24 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Thị Trấn Đại Từ's 4th-clearest and 11th-windiest month. For the whole year in context, see Thị Trấn Đại Từ's year-round climate.

Daytime high
31°
4th warmest
Overnight low
24°
9th coldest
Rainfall
206 mm
17.8 wet days
Daylight
12 h 06 min
5:48 AM – 5:55 PM
Cloud cover
69%
4th clearest
Wind
5 km/h
11th windiest
Solar energy
4.37 kWh/m²
Travel score
3.5
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical September day in Thị Trấn Đại Từ reaches about 31°C in the afternoon and slips back to 24°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 34°C. Set against its neighbours, September runs about 1°C cooler than August and about 2°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13225
23225
33225
43225
53125
63125
73125
83125
93124
103124
113124
123124
133124
143124
153124
163124
173124
183124
193124
203124
213124
223124
233123
243123
253123
263123
273123
283123
293023
303023

How September really feels in Thị Trấn Đại Từ

Once humidity and wind are folded in, September averages 30 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
30
1 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Thị Trấn Đại Từ 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.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan19° / 13°4910.810.85.7
Feb21° / 15°381011.35.9
Mar23° / 18°7112.911.86.0
Apr28° / 21°11213.612.55.3
May31° / 24°26019.8133.4
Jun32° / 25°36322.513.32.6
Jul32° / 26°35224.913.22.5
Aug32° / 25°34325.212.72.6
Sep31° / 24°20617.812.13.5
Oct29° / 21°901111.55.5
Nov25° / 18°587.9117.0
Dec21° / 14°38810.76.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 65%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12575
22575
32575
42575
52575
62773
72773
82773
92971
102971
112971
123169
133169
143367
153466
163565
173664
183763
193961
204060
214159
224258
234357
244357
254456
264456
274456
284654
294654
304654

Chance of precipitation in September

Any precipitation

Thị Trấn Đại Từ gets around 206 mm of rain over 17.8 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 60% and peaks near 75% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
175
275
374
474
573
672
771
870
969
1068
1166
1265
1363
1462
1560
1658
1757
1855
1954
2052
2151
2250
2349
2448
2547
2647
2746
2845
2945
3044

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable band about 56% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10011584
20011683
30011782
40011881
50121978
60122176
70132274
80132373
90142471
100142669
110152767
120162865
130172963
140283159
150293257
1602103355
1702113453
1802123551
1903133748
2003143846
2103153943
2203154041
2304164139
2404174236
2505184334
2605184432
2716194530
2816204528
2917204626
3018214624

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 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 24 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over September. Sunrise moves from 5:44 AM to 5:52 AM, and sunset from 6:10 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:446:10
212.45:446:09
312.45:456:08
412.45:456:07
512.45:456:06
612.35:456:05
712.35:466:04
812.35:466:03
912.35:466:02
1012.25:476:01
1112.25:476:00
1212.25:475:59
1312.25:475:58
1412.25:485:57
1512.15:485:56
1612.15:485:55
1712.15:485:54
1812.15:495:53
1912.15:495:52
2012.05:495:51
2112.05:495:50
2212.05:505:49
2312.05:505:48
2412.05:505:47
2511.95:515:46
2611.95:515:45
2711.95:515:44
2811.95:515:43
2911.85:525:42
3011.85:525:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.37 kWh/m².

For context, solar energy here swings from a low near 2.07 kWh/m² to a high of 4.56 kWh/m² in June across the year — September's 4.37 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.4Bright
54.4Bright
64.4Bright
74.4Bright
84.4Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.4Bright
164.4Bright
174.4Bright
184.4Bright
194.4Bright
204.4Bright
214.4Bright
224.4Bright
234.4Bright
244.4Bright
254.4Bright
264.4Bright
274.3Bright
284.3Bright
294.3Bright
304.3Bright
Planning a trip in September

Hazard calendar for Thị Trấn Đại Từ

In seasonPeak

In September, Thị Trấn Đại Từ sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Thị Trấn Đại Từ's monsoon runs May–September, when most of the year's rain falls.

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

Is September a good time to visit Thị Trấn Đại Từ?

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

3.5
Sightseeing
8th-best month of the year
5.3
Beach & pool
4th-best month of the year

September is a weaker month for outdoor sightseeing in Thị Trấn Đại Từ.

What to pack for Thị Trấn Đại Từ in September

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

In September, Thị Trấn Đại Từ sees daytime highs around 31°C and nights near 24°C. Pack light clothes and rain gear. About 18 days see rain.

light clothesrain gear

UV index in Thị Trấn Đại Từ 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 Thị Trấn Đại Từ peaks around June 23 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 21 at about 6 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highVery highExtremeVery highHighJun 23UV 12Nov 21UV 6
UV index (midday)Level
Jan6High
Feb7High
Mar9Very high
Apr6High
May9Very high
Jun12Extreme
Jul12Extreme
Aug11Extreme
Sep8Very high
Oct8Very high
Nov5High
Dec6High

Air quality in Thị Trấn Đại Từ 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 Thị Trấn Đại Từ is worst in December — around 102 µg/m³ PM2.5 (unhealthy), about 2.8× the cleanest month (July, 37 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyDec 20102 µg/m³Jul 1738 µg/m³
PM2.5 (µg/m³)Level
Jan98Unhealthy
Feb89Unhealthy
Mar86Unhealthy
Apr79Unhealthy
May57Unhealthy
Jun44Poor
Jul37Poor
Aug44Poor
Sep59Unhealthy
Oct76Unhealthy
Nov92Unhealthy
Dec102Unhealthy
Location & terrain

Where is Thị Trấn Đại Từ?

Thị Trấn Đại Từ sits at 21.6°N, 105.6°E, 63 m above sea level, in Vietnam. The nearest listed city is Thái Nguyên, 22 km away.

Topography around Thị Trấn Đại Từ

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Thị Trấn Đại Từ.

Within 3 km, the terrain around Thị Trấn Đại Từ has only modest variations in elevation — a maximum elevation change of 204 m around an average of 76 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,764 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,694 m.

The land around Thị Trấn Đại Từ is covered by trees (71%) within 3 km, trees (86%) within 16 km, and trees (78%) within 80 km.

3 km
204 m
16 km
1,764 m
80 km
1,694 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Thái Nguyên 22 km · Thành phố Sông Công 27 km · Phổ Yên 35 km · Vĩnh Yên 36 km · Việt Trì 42 km · Phúc Yên 45 km · Sóc Sơn 47 km · Cổ Đô 49 km

Vietnam travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B / C / F
220 V · 50 Hz
Prices
≈ 29% of US
price level, 2025
GDP per capita
$5,066
2025
Happiness
6.4 / 10
World Happiness, 2025
Safe drinking water
59%
of population, 2024
Homicide rate
1.5
per 100k, 2011
Road deaths
30.6
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 500
Religion
none 86%Catholic 6%Buddhist 6%Protestant 1%

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 Thị Trấn Đại Từ (21.6338°, 105.6377°, elevation 63 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).