Mae Sai weather in July

In July, Mae Sai sees average daytime highs of 31°C and overnight lows near 24°C, with 455 mm of rain across 28.5 wet days and about 13.1 hours of daylight. It is the 6th-warmest and 1st-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 July, and the air most often feels oppressive.

Daylight stretches from about 13 h 12 min at the start of July to 13 hours by month's end. Set against the rest of the year, July is Mae Sai's 12th-clearest and 5th-windiest month. For the whole year in context, see Mae Sai's year-round climate.

Daytime high: 31°; 6th warmest
Overnight low: 24°; 11th coldest
Rainfall: 455 mm; 28.5 wet days
Daylight: 13 h 06 min; 5:52 AM – 7:00 PM
Cloud cover: 93%; 12th clearest
Wind: 4 km/h; 5th windiest
Solar energy: 3.94 kWh/m²
Travel score: 2.5; out of 10

Mae Sai is subdistrict municipality in Chiang Rai province, Thailand.

Density: 5,365/km²; people per km²

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

← June Mae Sai year-round climate August →Best places to visit in July

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

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

A typical July day in Mae Sai 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, July runs about 1°C cooler than June and on par with August.

	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	31
Avg high (°C)	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	30	30	30	30	30	30	30	30	30	30	30	30
Avg low (°C)	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24

	Avg high (°C)	Avg low (°C)
1	31	24
2	31	24
3	31	24
4	31	24
5	31	24
6	31	24
7	31	24
8	31	24
9	31	24
10	31	24
11	31	24
12	31	24
13	31	24
14	31	24
15	31	24
16	31	24
17	31	24
18	31	24
19	31	24
20	30	24
21	30	24
22	30	24
23	30	24
24	30	24
25	30	24
26	30	24
27	30	24
28	30	24
29	30	24
30	30	24
31	30	24

How July really feels in Mae Sai

Once humidity and wind are folded in, July averages 31 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

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

Mae Sai weather by month

How July compares with the rest of the year at a glance. July is the 6th-warmest and 1st-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	27° / 14°	25	3.4	10.9	7.9
Feb	30° / 14°	15	2.4	11.3	6.1
Mar	33° / 17°	39	5.1	11.9	4.2
Apr	34° / 21°	112	10.7	12.5	3.2
May	33° / 23°	277	21.3	13	2.8
Jun	32° / 24°	349	26.7	13.2	2.4
Jul	31° / 24°	455	28.5	13.1	2.5
Aug	31° / 24°	424	28.7	12.7	2.6
Sep	31° / 23°	287	24.2	12.1	3.0
Oct	30° / 22°	134	16.7	11.5	4.3
Nov	29° / 18°	47	6.5	11	6.5
Dec	26° / 15°	31	4.4	10.8	7.9

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in July, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 2% of July, with mostly cloudy or overcast conditions the remaining 96%.

	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	31
Clearer (%)	5	4	4	3	3	3	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	5	5	5	5
Cloudier (%)	95	96	96	97	97	97	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	95	95	95	95

	Clearer (%)	Cloudier (%)
1	5	95
2	4	96
3	4	96
4	3	97
5	3	97
6	3	97
7	4	96
8	4	96
9	4	96
10	4	96
11	4	96
12	4	96
13	4	96
14	4	96
15	4	96
16	4	96
17	4	96
18	4	96
19	4	96
20	4	96
21	4	96
22	4	96
23	4	96
24	4	96
25	4	96
26	4	96
27	4	96
28	5	95
29	5	95
30	5	95
31	5	95

Chance of precipitation in July

Any precipitation

Mae Sai gets around 455 mm of rain over 28.5 wet days in July, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 92% and peaks near 93% 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	31
Rain chance (%)	89	89	89	90	90	90	91	91	91	91	91	91	91	92	92	92	92	92	92	92	92	92	93	93	93	93	93	93	93	93	93

	Rain chance (%)
1	89
2	89
3	89
4	90
5	90
6	90
7	91
8	91
9	91
10	91
11	91
12	91
13	91
14	92
15	92
16	92
17	92
18	92
19	92
20	92
21	92
22	92
23	93
24	93
25	93
26	93
27	93
28	93
29	93
30	93
31	93

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the oppressive band about 56% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

	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	31
Oppressive (%)	57	56	56	55	54	54	53	52	51	51	51	50	50	50	51	51	52	53	54	55	56	58	59	60	61	61	62	63	63	63	63
Miserable (%)	43	44	44	45	46	46	47	48	49	49	49	50	50	50	49	49	48	47	46	45	44	42	41	40	39	39	38	37	37	37	37

	Oppressive (%)	Miserable (%)
1	57	43
2	56	44
3	56	44
4	55	45
5	54	46
6	54	46
7	53	47
8	52	48
9	51	49
10	51	49
11	51	49
12	50	50
13	50	50
14	50	50
15	51	49
16	51	49
17	52	48
18	53	47
19	54	46
20	55	45
21	56	44
22	58	42
23	59	41
24	60	40
25	61	39
26	61	39
27	62	38
28	63	37
29	63	37
30	63	37
31	63	37

Wind in July

Winds average 4 km/h in July.

Across July, daily wind ranges from about 4 km/h on the calmest days to 4 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	31
Wind speed (km/h)	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
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	calm

	Wind speed (km/h)	Feels
1	4	calm
2	4	calm
3	4	calm
4	4	calm
5	4	calm
6	4	calm
7	4	calm
8	4	calm
9	4	calm
10	4	calm
11	4	calm
12	4	calm
13	4	calm
14	4	calm
15	4	calm
16	4	calm
17	4	calm
18	4	calm
19	4	calm
20	4	calm
21	4	calm
22	4	calm
23	4	calm
24	4	calm
25	4	calm
26	4	calm
27	4	calm
28	4	calm
29	4	calm
30	4	calm
31	4	calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 13 h 12 min at the start of July to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over July. Sunrise moves from 5:47 AM to 5:58 AM, and sunset from 7:01 PM to 6:55 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	31
Daylight (h)	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.2	13.1	13.1	13.1	13.1	13.1	13.1	13.1	13.1	13.1	13.1	13.0	13.0	13.0	13.0	13.0	13.0	13.0	13.0
Sunrise (AM)	5:47	5:47	5:48	5:48	5:48	5:49	5:49	5:49	5:50	5:50	5:50	5:51	5:51	5:52	5:52	5:52	5:53	5:53	5:53	5:54	5:54	5:55	5:55	5:55	5:56	5:56	5:56	5:57	5:57	5:58	5:58
Sunset (PM)	7:01	7:01	7:01	7:01	7:01	7:01	7:01	7:01	7:01	7:01	7:01	7:01	7:00	7:00	7:00	7:00	7:00	7:00	6:59	6:59	6:59	6:59	6:58	6:58	6:58	6:57	6:57	6:56	6:56	6:56	6:55

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	13.2	5:47	7:01
2	13.2	5:47	7:01
3	13.2	5:48	7:01
4	13.2	5:48	7:01
5	13.2	5:48	7:01
6	13.2	5:49	7:01
7	13.2	5:49	7:01
8	13.2	5:49	7:01
9	13.2	5:50	7:01
10	13.2	5:50	7:01
11	13.2	5:50	7:01
12	13.2	5:51	7:01
13	13.2	5:51	7:00
14	13.1	5:52	7:00
15	13.1	5:52	7:00
16	13.1	5:52	7:00
17	13.1	5:53	7:00
18	13.1	5:53	7:00
19	13.1	5:53	6:59
20	13.1	5:54	6:59
21	13.1	5:54	6:59
22	13.1	5:55	6:59
23	13.1	5:55	6:58
24	13.0	5:55	6:58
25	13.0	5:56	6:58
26	13.0	5:56	6:57
27	13.0	5:56	6:57
28	13.0	5:57	6:56
29	13.0	5:57	6:56
30	13.0	5:58	6:56
31	13.0	5:58	6:55

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 3.94 kWh/m².

For context, solar energy here swings from a low near 3.91 kWh/m² to a high of 6.25 kWh/m² in April across the year — July's 3.94 kWh/m² sits near the bottom.

	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	31
Solar energy (kWh/m²)	4.2	4.2	4.2	4.1	4.1	4.1	4.1	4.1	4.0	4.0	4.0	4.0	4.0	3.9	3.9	3.9	3.9	3.9	3.9	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	4.2	Bright
2	4.2	Bright
3	4.2	Bright
4	4.1	Bright
5	4.1	Bright
6	4.1	Bright
7	4.1	Bright
8	4.1	Bright
9	4.0	Bright
10	4.0	Bright
11	4.0	Bright
12	4.0	Moderate
13	4.0	Moderate
14	3.9	Moderate
15	3.9	Moderate
16	3.9	Moderate
17	3.9	Moderate
18	3.9	Moderate
19	3.9	Moderate
20	3.8	Moderate
21	3.8	Moderate
22	3.8	Moderate
23	3.8	Moderate
24	3.8	Moderate
25	3.8	Moderate
26	3.8	Moderate
27	3.8	Moderate
28	3.8	Moderate
29	3.8	Moderate
30	3.8	Moderate
31	3.8	Moderate

Planning a trip in July

Hazard calendar for Mae Sai

In seasonPeak

In July, Mae Sai sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Mae Sai'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 July a good time to visit Mae Sai?

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

2.5

Sightseeing

11th-best month of the year

3.7

Beach & pool

12th-best month of the year

July is a weaker month for outdoor sightseeing in Mae Sai.

What to pack for Mae Sai in July

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

In July, Mae Sai sees daytime highs around 31°C and nights near 24°C. Pack light clothes and rain gear. About 29 days see rain.

light clothesrain gear

UV index in Mae Sai in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mae Sai peaks around July 19 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 7 (high).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	7	9	9	10	11	13	13	13	11	10	8	7
Level	High	Very high	Very high	Very high	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	High

	UV index (midday)	Level
Jan	7	High
Feb	9	Very high
Mar	9	Very high
Apr	10	Very high
May	11	Extreme
Jun	13	Extreme
Jul	13	Extreme
Aug	13	Extreme
Sep	11	Extreme
Oct	10	Extreme
Nov	8	Very high
Dec	7	High

Air quality in Mae Sai in July

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Mae Sai is worst in April — around 156 µg/m³ PM2.5 (very unhealthy), about 12.0× the cleanest month (July, 13 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)	23	40	128	156	37	15	13	13	13	14	15	19
Level	Moderate	Poor	Unhealthy	Very unhealthy	Poor	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	23	Moderate
Feb	40	Poor
Mar	128	Unhealthy
Apr	156	Very unhealthy
May	37	Poor
Jun	15	Moderate
Jul	13	Moderate
Aug	13	Moderate
Sep	13	Moderate
Oct	14	Moderate
Nov	15	Moderate
Dec	19	Moderate

Location & terrain

Where is Mae Sai?

Mae Sai sits at 20.4°N, 99.9°E, 437 m above sea level, in Thailand. The nearest listed city is Tachilek, 2.0 km away.

Topography around Mae Sai

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

Within 3 km, the terrain around Mae Sai has significant variations in elevation — a maximum elevation change of 398 m around an average of 464 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,235 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,977 m.

The land around Mae Sai is covered by trees (54%) and artificial surfaces (33%) within 3 km, trees (61%) and cropland (27%) within 16 km, and trees (81%) within 80 km.

3 km

398 m

trees 54%

16 km

1,235 m

trees 61%

80 km

1,977 m

trees 81%

treesgrasslandcroplandartificial surfaces

← June Mae Sai year-round climate August →Best places to visit in July

July weather nearby: Tachilek 2.0 km · Ban Khoan 24 km · Mae Chan 32 km · Chiang Rai 59 km · Ban Houakhoua 64 km · Möng Yawng 97 km · Kengtung 133 km · Phayao 138 km

Thailand travel facts

Travel advisory: Level 1; Exercise Normal Precautions
Power plugs: Type A / B / C; 230 V · 50 Hz
Prices: ≈ 31% of US; price level, 2025
GDP per capita: $8,057; 2025
Happiness: 6.3 / 10; World Happiness, 2025
Homicide rate: 4.8; per 100k, 2011
Road deaths: 32.2; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Very low; EF EPI 402
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 Mae Sai (20.4335°, 99.8762°, elevation 437 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	31	24
2	31	24
3	31	24
4	31	24
5	31	24
6	31	24
7	31	24
8	31	24
9	31	24
10	31	24
11	31	24
12	31	24
13	31	24
14	31	24
15	31	24
16	31	24
17	31	24
18	31	24
19	31	24
20	30	24
21	30	24
22	30	24
23	30	24
24	30	24
25	30	24
26	30	24
27	30	24
28	30	24
29	30	24
30	30	24
31	30	24

	Clearer (%)	Cloudier (%)
1	5	95
2	4	96
3	4	96
4	3	97
5	3	97
6	3	97
7	4	96
8	4	96
9	4	96
10	4	96
11	4	96
12	4	96
13	4	96
14	4	96
15	4	96
16	4	96
17	4	96
18	4	96
19	4	96
20	4	96
21	4	96
22	4	96
23	4	96
24	4	96
25	4	96
26	4	96
27	4	96
28	5	95
29	5	95
30	5	95
31	5	95

	Rain chance (%)
1	89
2	89
3	89
4	90
5	90
6	90
7	91
8	91
9	91
10	91
11	91
12	91
13	91
14	92
15	92
16	92
17	92
18	92
19	92
20	92
21	92
22	92
23	93
24	93
25	93
26	93
27	93
28	93
29	93
30	93
31	93

	Oppressive (%)	Miserable (%)
1	57	43
2	56	44
3	56	44
4	55	45
5	54	46
6	54	46
7	53	47
8	52	48
9	51	49
10	51	49
11	51	49
12	50	50
13	50	50
14	50	50
15	51	49
16	51	49
17	52	48
18	53	47
19	54	46
20	55	45
21	56	44
22	58	42
23	59	41
24	60	40
25	61	39
26	61	39
27	62	38
28	63	37
29	63	37
30	63	37
31	63	37

	Avg high (°C)	Avg low (°C)
1	31	24
2	31	24
3	31	24
4	31	24
5	31	24
6	31	24
7	31	24
8	31	24
9	31	24
10	31	24
11	31	24
12	31	24
13	31	24
14	31	24
15	31	24
16	31	24
17	31	24
18	31	24
19	31	24
20	30	24
21	30	24
22	30	24
23	30	24
24	30	24
25	30	24
26	30	24
27	30	24
28	30	24
29	30	24
30	30	24
31	30	24

	Clearer (%)	Cloudier (%)
1	5	95
2	4	96
3	4	96
4	3	97
5	3	97
6	3	97
7	4	96
8	4	96
9	4	96
10	4	96
11	4	96
12	4	96
13	4	96
14	4	96
15	4	96
16	4	96
17	4	96
18	4	96
19	4	96
20	4	96
21	4	96
22	4	96
23	4	96
24	4	96
25	4	96
26	4	96
27	4	96
28	5	95
29	5	95
30	5	95
31	5	95

	Rain chance (%)
1	89
2	89
3	89
4	90
5	90
6	90
7	91
8	91
9	91
10	91
11	91
12	91
13	91
14	92
15	92
16	92
17	92
18	92
19	92
20	92
21	92
22	92
23	93
24	93
25	93
26	93
27	93
28	93
29	93
30	93
31	93

	Oppressive (%)	Miserable (%)
1	57	43
2	56	44
3	56	44
4	55	45
5	54	46
6	54	46
7	53	47
8	52	48
9	51	49
10	51	49
11	51	49
12	50	50
13	50	50
14	50	50
15	51	49
16	51	49
17	52	48
18	53	47
19	54	46
20	55	45
21	56	44
22	58	42
23	59	41
24	60	40
25	61	39
26	61	39
27	62	38
28	63	37
29	63	37
30	63	37
31	63	37

	Avg high (°C)	Avg low (°C)
1	31	24
2	31	24
3	31	24
4	31	24
5	31	24
6	31	24
7	31	24
8	31	24
9	31	24
10	31	24
11	31	24
12	31	24
13	31	24
14	31	24
15	31	24
16	31	24
17	31	24
18	31	24
19	31	24
20	30	24
21	30	24
22	30	24
23	30	24
24	30	24
25	30	24
26	30	24
27	30	24
28	30	24
29	30	24
30	30	24
31	30	24

	Clearer (%)	Cloudier (%)
1	5	95
2	4	96
3	4	96
4	3	97
5	3	97
6	3	97
7	4	96
8	4	96
9	4	96
10	4	96
11	4	96
12	4	96
13	4	96
14	4	96
15	4	96
16	4	96
17	4	96
18	4	96
19	4	96
20	4	96
21	4	96
22	4	96
23	4	96
24	4	96
25	4	96
26	4	96
27	4	96
28	5	95
29	5	95
30	5	95
31	5	95

	Rain chance (%)
1	89
2	89
3	89
4	90
5	90
6	90
7	91
8	91
9	91
10	91
11	91
12	91
13	91
14	92
15	92
16	92
17	92
18	92
19	92
20	92
21	92
22	92
23	93
24	93
25	93
26	93
27	93
28	93
29	93
30	93
31	93

	Oppressive (%)	Miserable (%)
1	57	43
2	56	44
3	56	44
4	55	45
5	54	46
6	54	46
7	53	47
8	52	48
9	51	49
10	51	49
11	51	49
12	50	50
13	50	50
14	50	50
15	51	49
16	51	49
17	52	48
18	53	47
19	54	46
20	55	45
21	56	44
22	58	42
23	59	41
24	60	40
25	61	39
26	61	39
27	62	38
28	63	37
29	63	37
30	63	37
31	63	37