Hmaw Bi weather in September

In September, Hmaw Bi sees average daytime highs of 31°C and overnight lows near 25°C, with 511 mm of rain across 29 wet days and about 12.1 hours of daylight. It is the 9th-warmest and 4th-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 2% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 18 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Hmaw Bi's 9th-clearest and 8th-windiest month. For the whole year in context, see Hmaw Bi's year-round climate.

Daytime high
31°
9th warmest
Overnight low
25°
8th coldest
Rainfall
511 mm
29 wet days
Daylight
12 h 06 min
5:51 AM – 5:57 PM
Cloud cover
89%
9th clearest
Wind
6 km/h
8th windiest
Solar energy
3.81 kWh/m²
Travel score
2.3
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 Hmaw Bi reaches about 31°C in the afternoon and slips back to 25°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 33°C. Set against its neighbours, September runs about 1°C warmer than August and about 2°C cooler than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13025
23025
33025
43025
53025
63025
73125
83125
93125
103125
113125
123125
133125
143125
153125
163125
173125
183125
193125
203126
213126
223126
233126
243226
253226
263226
273226
283226
293226
303226

How September really feels in Hmaw Bi

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
14 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.

Hmaw Bi weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 20°7111.14.7
Feb34° / 21°30.711.43.7
Mar35° / 24°203.611.92.9
Apr36° / 26°699.512.42.4
May33° / 26°39526.512.82.2
Jun31° / 26°70030132.3
Jul30° / 26°78330.912.92.5
Aug30° / 25°75430.912.62.5
Sep31° / 25°5112912.12.3
Oct33° / 25°19520.611.62.8
Nov33° / 24°34511.24.0
Dec33° / 21°90.8114.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 5% of September, with mostly cloudy or overcast conditions the remaining 93%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1298
2298
3298
4298
5298
6298
7397
8397
9397
10397
11397
12496
13595
14595
15595
16694
17694
18793
19892
20991
211090
221090
231189
241288
251387
261486
271486
281585
291783
301783

Chance of precipitation in September

Any precipitation

Hmaw Bi gets around 511 mm of rain over 29 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 97% and peaks near 100% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
1100
2100
399
499
599
699
799
899
999
1099
1198
1298
1398
1498
1597
1697
1797
1896
1996
2096
2195
2295
2395
2494
2594
2694
2793
2893
2992
3091

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 100% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
10100
20100
30100
40100
50100
60100
70100
80100
90100
100100
110100
120100
130100
140100
150100
16199
17199
18199
19199
20199
21199
22199
23199
24199
25199
26199
27199
28199
29199
30199

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 5 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 18 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over September. Sunrise moves from 5:49 AM to 5:53 AM, and sunset from 6:09 PM to 5:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:496:09
212.35:506:08
312.35:506:08
412.35:506:07
512.35:506:06
612.35:506:05
712.25:506:04
812.25:506:03
912.25:506:03
1012.25:506:02
1112.25:516:01
1212.25:516:00
1312.15:515:59
1412.15:515:58
1512.15:515:57
1612.15:515:57
1712.15:515:56
1812.15:515:55
1912.05:515:54
2012.05:525:53
2112.05:525:52
2212.05:525:52
2312.05:525:51
2412.05:525:50
2511.95:525:49
2611.95:525:48
2711.95:525:47
2811.95:535:47
2911.95:535:46
3011.95:535:45

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.81 kWh/m².

For context, solar energy here swings from a low near 2.89 kWh/m² to a high of 6.49 kWh/m² in April across the year — September's 3.81 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
13.3Moderate
23.3Moderate
33.4Moderate
43.4Moderate
53.4Moderate
63.4Moderate
73.5Moderate
83.5Moderate
93.5Moderate
103.5Moderate
113.6Moderate
123.6Moderate
133.7Moderate
143.7Moderate
153.8Moderate
163.8Moderate
173.8Moderate
183.9Moderate
193.9Moderate
204.0Moderate
214.0Bright
224.1Bright
234.1Bright
244.2Bright
254.2Bright
264.3Bright
274.3Bright
284.4Bright
294.4Bright
304.5Bright
Planning a trip in September

Hazard calendar for Hmaw Bi

In seasonPeak

In September, Hmaw Bi sits inside its cyclone and monsoon season. The full year is below, with each hazard's peak months called out.

Hmaw Bi sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.

Hmaw Bi's monsoon runs May–September, when most of the year's rain falls.

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

Is September a good time to visit Hmaw Bi?

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

2.3
Sightseeing
10th-best month of the year
3.5
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Hmaw Bi.

What to pack for Hmaw Bi in September

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

In September, Hmaw Bi sees daytime highs around 31°C and nights near 25°C. Pack light clothes and rain gear. About 29 days see rain.

light clothesrain gear

Sea temperature near Hmaw Bi in September

The nearest coast averages about 28°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 26 km away) is warmest in April at about 30°C and coldest in January near 27°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb28Warm
Mar29Tropical
Apr30Tropical
May30Tropical
Jun29Tropical
Jul28Tropical
Aug28Tropical
Sep28Tropical
Oct29Tropical
Nov29Tropical
Dec28Warm

UV index in Hmaw Bi in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Hmaw Bi peaks around August 11 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highAug 11UV 13Dec 19UV 7
UV index (midday)Level
Jan8Very high
Feb10Very high
Mar10Very high
Apr10Very high
May11Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct10Extreme
Nov8Very high
Dec7Very high

Air quality in Hmaw Bi 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 Hmaw Bi is worst in February — around 50 µg/m³ PM2.5 (poor), about 3.5× the cleanest month (June, 15 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateFeb 1649 µg/m³Jun 2115 µg/m³
PM2.5 (µg/m³)Level
Jan40Poor
Feb50Poor
Mar42Poor
Apr28Moderate
May19Moderate
Jun15Moderate
Jul16Moderate
Aug16Moderate
Sep15Moderate
Oct17Moderate
Nov23Moderate
Dec30Moderate
Location & terrain

Where is Hmaw Bi?

Hmaw Bi sits at 16.6°N, 97.6°E, 13 m above sea level, in Myanmar. The nearest listed city is Martaban, 12 km away.

Topography around Hmaw Bi

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

Within 3 km, the terrain around Hmaw Bi has only modest variations in elevation — a maximum elevation change of 46 m around an average of 4 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 853 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,039 m.

The land around Hmaw Bi is covered by cropland (56%) and water (25%) within 3 km, cropland (44%) and trees (34%) within 16 km, and trees (43%), water (27%) and cropland (24%) within 80 km.

3 km
46 m
16 km
853 m
80 km
2,039 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Martaban 12 km · Mawlamyine 16 km · Paung 17 km · Hpa-An 28 km · Thaton 41 km · Mudon 44 km · Kyaikkami 62 km · Kawkareik 67 km

Myanmar travel facts

Travel advisory
Level 4
Do Not Travel
Power plugs
Type A / C / D / F / G / I
230 V · 50 Hz
Prices
≈ 38% of US
price level, 2025
GDP per capita
$1,489
2025
Happiness
4.3 / 10
World Happiness, 2025
Safe drinking water
60%
of population, 2024
Homicide rate
2.6
per 100k, 2023
Road deaths
20.4
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Very low
EF EPI 444
Religion
Buddhist 88%Christian 6%Muslim 4%Animist 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 Hmaw Bi (16.6356°, 97.6153°, elevation 13 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).