Siem Reap Weather in June
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Asia › 🇰🇭 Cambodia › Siem Reap
Updated: March 2026
Is June a Good Time to Visit Siem Reap?
June is a fair time to visit Siem Reap (4/10). With 10 daily sunshine hours and only 21 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 6th sunniest of the year in Siem Reap. June suits travellers visiting for indoor culture, food, and architecture rather than outdoor activities. Pack accordingly for 21 potential rain days. July offers a similar profile at lower hotel rates if dates are flexible. Watch out for prolonged rain stretches: with 21 wet days, a fully outdoor itinerary is risky. Build in museum days and covered market visits as contingency. Planning tips: most accommodation categories have availability, and last-minute deals are common. The quieter streets and shorter queues can make this a genuinely enjoyable time to visit for the right type of traveller. Budget-conscious visitors will find the best value of the year in this period.
The single most important thing to know about visiting Siem Reap in June: rain is a genuine factor across 21 days of the month, meaning your plans need built-in indoor alternatives. Precipitation totals 137mm for the month, spread across roughly 21 days, and 10 sunshine hours per day give you a reliable window for outdoor plans.
32°C
Avg High
26°C
Avg Low
21 days
Rain Days
10h
Sunshine
82%
Humidity
Temperature in Siem Reap in June
The 6°C day-night temperature range is typical for continental climates: a light jacket in the morning that you shed by midday and need again after sunset. At 82% humidity, the 32°C daytime high feels 2-4°C warmer in practice: quick-dry fabrics and shade-seeking between noon and 3pm are the sensible response. UV index averages 8 this month, classed as high to very high. SPF 30+ sunscreen, a brim hat, and sunglasses are not optional between 10am and 4pm. Wind averages 15 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 90°F average high, 79°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).
Temperature in June
Monthly Precipitation (mm)
What to Wear in Siem Reap in June
Packing for Siem Reap in June means dressing for 32°C days and 26°C evenings. A lightweight linen or cotton shirt with loose-fit trousers or a sundress handles the 32°C daytime heat. Evening temperatures settle at 26°C, a modest 6°C drop that a light cardigan or denim jacket covers. For footwear, breathable walking sandals work for casual exploration, but closed-toe trainers are better for uneven surfaces in the historic centre. With 21 rain days expected, a compact travel umbrella is worth the bag space. A waterproof jacket is better than an umbrella if you plan full-day outdoor routes. For temple and religious site visits, carry a lightweight scarf or sarong to cover shoulders and knees, required at most major sites across the region. At 82% average humidity, quick-dry synthetic or bamboo fabrics dry overnight and stay comfortable longer than cotton.
Local tip: Loose-weave linen and moisture-wicking fabrics are the practical choice in Siem Reap's heat and humidity. Many shopping centres run air conditioning at near-arctic levels, so a thin layer in your bag prevents discomfort indoors.
Events in Siem Reap in June
June has no major festivals or public holidays in Siem Reap, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.
What to Pack for Siem Reap in June
Based on 32°C average highs and 21 rainy days
- Lightweight breathable clothing
- Linen or bamboo shirts for the hottest hours
- Sun hat with a wide brim
- UV-protective sunglasses
- Hydration bottle (at least 1 litre)
- Quick-dry travel towel
- Anti-chafe balm for long walking days
- Moisture-wicking synthetic fabrics for active days
- Compact folding umbrella
- Waterproof outer layer or packable rain jacket
- Quick-dry clothing that recovers fast after a shower
- SPF 30+ sunscreen
- Comfortable walking shoes (a second pair lets the first air out overnight)
- Universal travel adapter
- Small day pack for city exploration
- Reusable water bottle
Best Activities in Siem Reap in June
- Early morning walk through Siem Reap's historic market districtBest before 9amTemperatures are still manageable at 28°C before the midday heat builds
- Open-air rooftop dining at sunsetFrom 6pm onwardsThe 32°C daytime heat drops noticeably after sunset, making al fresco dining comfortable
- Waterfront promenade or harbour walkEarly morning or after 5pmSea breezes cut through the humidity, making coastal routes the most pleasant in heat
- Guided cycling tour of the old quarterFirst tour of the day (7-9am)The low-traffic window before tourist crowds and the cooler morning air make this the prime riding slot
- Spend a morning in the national or city art museumOpens at 10am; arrive earlyWith 21 rain days expected, having a full-day indoor plan is practical insurance
- Cooking class focused on regional cuisineHalf-day sessions run 10am-1pm or 3-6pmIndoor activity that fills a rainy half-day with genuine cultural content
- Visit covered historical sites: cathedral, palace, or bazaarAny time; most crowded middayRoofed monuments and covered markets provide exploration without weather exposure
- Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningJune brings distinct seasonal changes to public green spaces worth exploring
- Seek out chilled local specialities: cold-brew tea, ice desserts, or chilled seafood at street-level stallsAny time; most atmospheric in evening marketsHot-weather street food culture peaks in June, with vendors setting up specifically for warm evenings
Why is Siem Reap warm in June?
Siem Reap's June climate is governed by the Inter-Tropical Convergence Zone (ITCZ), which draws moisture-laden trade winds across the region, producing the characteristic wet season rainfall of steamy tropical cities. Daytime heat peaks around 32°C, moderated slightly by afternoon convective showers. Overnight temperatures remain warm at 26°C because the humid air retains heat effectively. Climate data: Open-Meteo ERA5 (1991–2020).
Sunshine Hours
The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.
UV Index
A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate -- wear sunscreen. UV 6-7: High -- hat and SPF 30+ essential. UV 8-10: Very High -- limit midday exposure. UV 11+: Extreme -- seek shade between 10am-4pm.
Rain Days
A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.
Humidity
Relative humidity as a percentage. Below 40%: Dry -- skin and throat may feel parched. 40-60%: Comfortable -- ideal for most people. 60-80%: Sticky -- light, breathable fabrics recommended. Above 80%: Muggy -- heat feels more intense; quick-dry clothing is essential.
Frequently Asked Questions: Siem Reap in June
June ranks 6th sunniest of the year in Siem Reap, with an average 10 daily sunshine hours. The driest months are January, February, and December. March is the hottest month (34°C avg high); September is the coolest (30°C). From here, temperatures fall 0°C into July. Compared to last month (May: 33°C high, 22 rain days), June is cooler and drier. June sits in the middle of the annual sunshine ranking for Siem Reap, offering a reasonable balance of good weather and manageable crowds.
Year-Round Climate
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 31°C | 21°C | 2 | 10h | View |
| February | 33°C | 23°C | 3 | 11h | View |
| March | 34°C | 25°C | 9 | 11h | View |
| April | 34°C | 26°C | 15 | 11h | View |
| May | 33°C | 26°C | 22 | 11h | View |
| June | 32°C | 26°C | 21 | 10h | View |
| July | 32°C | 25°C | 22 | 9h | View |
| August | 31°C | 25°C | 25 | 9h | View |
| September | 30°C | 25°C | 26 | 8h | View |
| October | 30°C | 24°C | 23 | 9h | View |
| November | 30°C | 23°C | 9 | 10h | View |
| December | 30°C | 21°C | 3 | 10h | View |
Plan Your Trip to Siem Reap
Nearby Destinations with Similar Weather
These cities are within 500 km and experience broadly comparable weather conditions during the same calendar month, making them practical standalone alternatives or worthwhile additions to a longer regional itinerary.
Data Sources for Siem Reap
Climate normals represent 30-year averages (1991-2020). Individual years may vary.