Long, Thailand experiences average highs of 32°C (90°F) and lows of 23°C (73°F) throughout the year. Rainfall is frequent, averaging about 14 rainy days per month. Sunshine is abundant, averaging about 9 hours per day. Average highs have cooled by 0.7°C (1.3°F) across the available records.
Long, Thailand Weather & Climate 2026
Monthly climate averages for Long, Thailand. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: May–Oct At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
3.9/10
Best: January, February, December
UV Index
7
High
Temperature 32°C / 23°C
Feels Like 37°C / 27°C
Rainy Days 14
Rainfall 127 mm
Sunshine 9 h
Humidity 75%
Wind Speed 8 km/h
Dew Point 22°C
Hottest Month
37°C
April
Avg Low 26°C
Rain 7 days
Coldest Month
19°C
January
Avg High 30°C
Rain 3 days
Driest Month
2 days
February
Avg High 33°C
Avg Low 20°C
Windiest Month
10 km/h
March (Gusts 27)
Worst Time to Visit
Consider avoiding May, July, August, September due to extreme heat, heavy rainfall, oppressive humidity.
Sun Position
Sunrise 05:45
Daylight 13.2h
Sunset 18:57
Live conditions —
Long on the map · live conditions
Long, Thailand
- Continent
- Asia
- Country
- Thailand
- City
- Long
- Population
- 11.8K
- Coordinates
- 18.07°, 99.83°
Seasonal Breakdown
Spring
Mar–May
Avg High 36°C
Avg Low 25°C
Rain 9 days/mo
Summer
Jun–Aug
Avg High 31°C
Avg Low 25°C
Rain 26 days/mo
Autumn
Sep–Nov
Avg High 30°C
Avg Low 23°C
Rain 17 days/mo
Winter
Dec–Feb
Avg High 31°C
Avg Low 19°C
Rain 2 days/mo
3/3 best months
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
High Low Shaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 30°C / 19°C . Feb: 33°C / 20°C . Mar: 36°C / 24°C . Apr: 37°C / 26°C . May: 34°C / 26°C . Jun: 32°C / 25°C . Jul: 31°C / 25°C . Aug: 30°C / 24°C . Sep: 30°C / 24°C . Oct: 30°C / 24°C . Nov: 30°C / 22°C . Dec: 29°C / 19°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 22 mm. Feb: 13 mm. Mar: 21 mm. Apr: 56 mm. May: 163 mm. Jun: 199 mm. Jul: 243 mm. Aug: 320 mm. Sep: 279 mm. Oct: 161 mm. Nov: 38 mm. Dec: 12 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 69%. Feb: 61%. Mar: 54%. Apr: 59%. May: 76%. Jun: 84%. Jul: 87%. Aug: 89%. Sep: 90%. Oct: 86%. Nov: 78%. Dec: 70%.
Monthly Wind Speed
Wind Speed Gusts
Bar chart showing monthly wind speed. Jan: 7 km/h . Feb: 9 km/h . Mar: 10 km/h . Apr: 9 km/h . May: 9 km/h . Jun: 10 km/h . Jul: 9 km/h . Aug: 8 km/h . Sep: 7 km/h . Oct: 6 km/h . Nov: 7 km/h . Dec: 7 km/h .
Sunshine
Sunshine
Sunshine: Jan: 10h. Feb: 11h. Mar: 11h. Apr: 11h. May: 10h. Jun: 9h. Jul: 7h. Aug: 7h. Sep: 8h. Oct: 9h. Nov: 9h. Dec: 10h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 7. Feb: UV 8. Mar: UV 9. Apr: UV 9. May: UV 8. Jun: UV 7. Jul: UV 7. Aug: UV 7. Sep: UV 7. Oct: UV 8. Nov: UV 7. Dec: UV 6.
Monthly Daylight Hours
Daylight 12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy
Climate Trends
Average highs have cooled by 0.7°C (1.3°F) across the available records. Average rainfall has remained broadly steady.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Mar 2025 · 37°C | Apr · 37°C |
| Coldest month | Jan 2025 · 17°C | Jan · 19°C |
| Wettest month | Jul 2025 · 330 mm | Aug · 320 mm |
| Windiest month | Mar 2025 · 10 km/h | Mar · 10 km/h |
Month-by-Month Weather Table
January best
Excellent 
February best
Excellent March
Fair April
Poor May
Wet June
Wet July
Wet August
Wet September
Wet October
Wet November
Fair December best
Excellent | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January best | 30°C / 19°C | 32°C / 20°C | 3days (22 mm) Excellent | 9.7h Good | 69% Muggy | 6.6 High | Excellent | View Details |
| February best | 33°C / 20°C | 35°C / 22°C | 2days (13 mm) Excellent | 10.5h Excellent | 61% Muggy | 7.6 Very High | Excellent | View Details |
| March | 36°C / 24°C | 39°C / 27°C | 2days (21 mm) Excellent | 10.8h Excellent | 54% Moderate | 8.6 Very High | Fair | View Details |
| April | 37°C / 26°C | 41°C / 30°C | 7days (56 mm) Good | 11h Excellent | 59% Moderate | 8.9 Very High | Poor | View Details |
| May | 34°C / 26°C | 41°C / 31°C | 19days (163 mm) Wet | 9.8h Good | 76% Humid | 8.3 Very High | Wet | View Details |
| June | 32°C / 25°C | 38°C / 30°C | 24days (199 mm) Wet | 8.5h Good | 84% Humid | 7.4 Very High | Wet | View Details |
| July | 31°C / 25°C | 37°C / 30°C | 27days (243 mm) Wet | 7.3h Good | 87% Very Muggy | 6.7 High | Wet | View Details |
| August | 30°C / 24°C | 37°C / 30°C | 27days (320 mm) Wet | 6.9h Fair | 89% Very Muggy | 6.8 High | Wet | View Details |
| September | 30°C / 24°C | 37°C / 30°C | 27days (279 mm) Wet | 7.9h Good | 90% Very Muggy | 7.4 Very High | Wet | View Details |
| October | 30°C / 24°C | 37°C / 29°C | 18days (161 mm) Wet | 8.9h Good | 86% Very Muggy | 7.5 Very High | Wet | View Details |
| November | 30°C / 22°C | 35°C / 25°C | 7days (38 mm) Good | 9.3h Good | 78% Humid | 6.5 High | Fair | View Details |
| December best | 29°C / 19°C | 32°C / 21°C | 2days (12 mm) Excellent | 9.5h Good | 70% Muggy | 6.2 High | Excellent | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Long are January, February, December, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Long, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Long is April, with average daytime highs of 37°C (98°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Long is January, with average overnight lows of 19°C (65°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Long is August, averaging 320mm of precipitation across 27 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Long runs through July, August, September, June, with the heaviest rainfall in July. Based on 10-year averages for Long.
Long receives approximately 110 sunshine hours per year. The sunniest month is April with around 11 hours. Based on climate data for Long.
The least favorable months to visit Long are May, July, August, September, primarily due to extreme heat, heavy rainfall, oppressive humidity. For the best conditions, consider January, February, December instead.
The annual average UV index in Long is 7, classified as high. SPF 30+ sunscreen, sunglasses, and seeking shade between 10:00–16:00 are strongly recommended.
Average humidity in Long is 75%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Average wind speeds in Long are 8 km/h (5 mph). The windiest month is March with peak winds reaching 10 km/h (6 mph) (gusts up to 27 km/h / 17 mph).
Long averages 7 clear-sky days per month with overall cloud cover around 57%. The clearest skies occur in February.
The annual average dew point in Long is 22°C (72°F), which feels muggy and uncomfortable. Expect heavy perspiration during warmer months — stay hydrated and take breaks in air-conditioned spaces.
Long has a Tropical Monsoon climate, classified as Am under the Köppen system. Tropical climates are warm year-round with high rainfall and temperatures rarely dropping below 18°C (64°F).
The 'feels like' temperature in Long ranges from 27°C (81°F) to 37°C (99°F) on average. Humidity and radiant heat mean it often feels warmer than the thermometer reads, especially in summer months.
June is not the best time to visit Long, with a climate score of 1.7/10. Consider visiting during January, February, December instead for better conditions.
For June in Long, pack Umbrella, Waterproof jacket, Waterproof shoes, Breathable clothing, Sunscreen (SPF 30+). With average highs of 32°C (89°F) and 24 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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