Siem Reap weather in July

In July, Siem Reap sees average daytime highs of 32°C and overnight lows near 27°C, with 135 mm of rain across 22.1 wet days and about 12.7 hours of daylight. It is the 6th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 4% of the time in July, and the air most often feels miserable.

Daylight stretches from about 12 h 48 min at the start of July to 12 h 36 min by month's end. Set against the rest of the year, July is Siem Reap's 9th-clearest and 1st-windiest month. For the whole year in context, see Siem Reap's year-round climate.

Daytime high
32°
6th warmest
Overnight low
27°
9th coldest
Rainfall
135 mm
22.1 wet days
Daylight
12 h 42 min
5:49 AM – 6:32 PM
Cloud cover
86%
9th clearest
Wind
10 km/h
1st windiest
Solar energy
5.13 kWh/m²
Travel score
2.6
out of 10

Siem Reap is capital of the same named Cambodian province.

Founded
~802 CE

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical July day in Siem Reap reaches about 32°C in the afternoon and slips back to 27°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 35°C. Set against its neighbours, July runs on par with June and on par with August.

25°28°30°33°35°151015202531
Avg high (°C)Avg low (°C)
13327
23327
33327
43327
53327
63327
73327
83327
93327
103327
113327
123327
133327
143327
153327
163327
173327
183327
193227
203227
213227
223227
233227
243227
253227
263227
273227
283226
293226
303226
313226

How July really feels in Siem Reap

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
31
31 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

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

Siem Reap weather by month

How July compares with the rest of the year at a glance. July is the 6th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°91.911.35.5
Feb33° / 24°132.611.64.5
Mar34° / 26°527.811.93.2
Apr35° / 27°9413.512.32.5
May34° / 27°14821.412.62.2
Jun33° / 27°13220.712.82.4
Jul32° / 27°13522.112.72.6
Aug32° / 26°16224.412.42.4
Sep31° / 26°24425.912.12.5
Oct31° / 25°22423.311.73.1
Nov31° / 24°628.811.44.7
Dec30° / 23°162.911.25.7

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 8% of July, with mostly cloudy or overcast conditions the remaining 88%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11387
21486
31486
41486
51486
61486
71486
81486
91486
101486
111585
121585
131585
141585
151486
161486
171486
181387
191288
201288
211288
221189
231189
24991
25991
26892
27793
28793
29793
30793
31694

Chance of precipitation in July

Any precipitation

Siem Reap gets around 135 mm of rain over 22.1 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 71% and peaks near 73% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
171
271
371
471
571
671
771
871
971
1071
1171
1271
1371
1470
1570
1670
1770
1870
1970
2070
2170
2270
2370
2471
2571
2671
2772
2872
2972
3073
3173

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the miserable band about 76% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
11783
21783
31783
41783
51882
61882
71882
81981
92080
102080
112179
122278
132278
142377
152476
162476
172575
182674
192773
202773
212872
222872
232971
242971
253070
263070
273070
283070
293070
303070
313070

Wind in July

Winds average 10 km/h in July, the windiest month of the year.

Across July, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 12 h 48 min at the start of July to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over July. Sunrise moves from 5:45 AM to 5:52 AM, and sunset from 6:31 PM to 6:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:456:31
212.85:456:31
312.85:456:31
412.85:456:32
512.85:466:32
612.85:466:32
712.85:466:32
812.85:466:32
912.85:476:32
1012.75:476:32
1112.75:476:32
1212.75:486:32
1312.75:486:32
1412.75:486:32
1512.75:486:32
1612.75:496:32
1712.75:496:32
1812.75:496:32
1912.75:496:31
2012.75:506:31
2112.75:506:31
2212.75:506:31
2312.75:516:31
2412.75:516:31
2512.75:516:30
2612.65:516:30
2712.65:526:30
2812.65:526:30
2912.65:526:29
3012.65:526:29
3112.65:526:29

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.13 kWh/m².

For context, solar energy here swings from a low near 4.62 kWh/m² to a high of 6.16 kWh/m² in April across the year — July's 5.13 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.1Bright
205.1Bright
215.1Bright
225.1Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in July

Hazard calendar for Siem Reap

In seasonPeak

In July, Siem Reap sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.

Siem Reap sits in the Pacific typhoon belt; the season peaks July–October.

Siem Reap's rainy season runs May–October, when most of the year's rain falls.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is July a good time to visit Siem Reap?

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

2.6
Sightseeing
7th-best month of the year
4.4
Beach & pool
8th-best month of the year

July is a weaker month for outdoor sightseeing in Siem Reap.

What to pack for Siem Reap in July

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

In July, Siem Reap sees daytime highs around 32°C and nights near 27°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

UV index in Siem Reap 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 Siem Reap peaks around August 16 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 22 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highAug 16UV 14Nov 22UV 8
UV index (midday)Level
Jan10Very high
Feb10Very high
Mar12Extreme
Apr12Extreme
May11Extreme
Jun12Extreme
Jul13Extreme
Aug14Extreme
Sep12Extreme
Oct11Extreme
Nov8Very high
Dec8Very high

Air quality in Siem Reap 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 Siem Reap is worst in February — around 40 µg/m³ PM2.5 (poor), about 2.9× the cleanest month (November, 14 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateFeb 2240 µg/m³Nov 2214 µg/m³
PM2.5 (µg/m³)Level
Jan29Moderate
Feb40Poor
Mar40Poor
Apr37Poor
May19Moderate
Jun15Moderate
Jul16Moderate
Aug15Moderate
Sep15Moderate
Oct17Moderate
Nov14Moderate
Dec14Moderate
Location & terrain

Where is Siem Reap?

Siem Reap sits at 13.4°N, 103.9°E, 18 m above sea level, in Cambodia. The nearest listed city is Yeang, 34 km away.

YeangPhum Ânlŭng VĭlBattambangPhumĭ TnaôtPursatSamraongSisophonAnlong Veaeng

Topography around Siem Reap

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

Within 3 km, the terrain around Siem Reap has only modest variations in elevation — a maximum elevation change of 28 m around an average of 17 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 123 m; within 80 km, significant variations in elevation — a maximum elevation change of 484 m.

The land around Siem Reap is covered by artificial surfaces (60%) and trees (24%) within 3 km, cropland (45%) and trees (30%) within 16 km, and cropland (48%) and trees (30%) within 80 km.

3 km
28 m
16 km
123 m
80 km
484 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
July weather nearby: Yeang 34 km · Phum Ânlŭng Vĭl 74 km · Battambang 77 km · Phumĭ Tnaôt 89 km · Pursat 92 km · Samraong 98 km · Sisophon 99 km · Anlong Veaeng 100 km

Cambodia travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / C / G
230 V · 50 Hz
Prices
≈ 34% of US
price level, 2025
GDP per capita
$2,872
2025
Happiness
4.5 / 10
World Happiness, 2025
Safe drinking water
30%
of population, 2024
Homicide rate
1.8
per 100k, 2011
Road deaths
19.6
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Very low
EF EPI 390
Religion
Buddhist 97%Muslim 2%other 1%Christian 0%

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 Siem Reap (13.3618°, 103.8606°, elevation 18 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). 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).