Siutu, Samoa experiences average highs of 26°C (79°F) and lows of 24°C (75°F) throughout the year. Rainfall is frequent, averaging about 26 rainy days per month. Sunshine is abundant, averaging about 10 hours per day. High humidity combined with warm temperatures produces a tropical feel year-round. Average highs have stayed broadly stable across the available records.
Siutu, Samoa Weather & Climate 2026
Monthly climate averages for Siutu, Samoa. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Feb–Sep 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
5.9/10
Best: June, July, August, September
UV Index
8
High
Temperature 26°C / 24°C
Feels Like 31°C / 27°C
Rainy Days 26
Rainfall 232 mm
Sunshine 10 h
Humidity 85%
Wind Speed 17 km/h
Dew Point 22°C
Hottest Month
27°C
March
Avg Low25°C
Rain28days
Coldest Month
23°C
August
Avg High26°C
Rain22days
Driest Month
20days
July
Avg High26°C
Avg Low24°C
Windiest Month
21 km/h
July (Gusts 43)
Sea Temperature
28°C – 30°C
Warmest water: April (
30.3°C
)
Worst Time to Visit
Consider avoiding January, February, November, December due to heavy rainfall, oppressive humidity.
Sun Position
Sunrise 06:53
Daylight 11.3h
Sunset 18:12
Live conditions—
Siutu on the map · live conditions
Siutu, Samoa
- Continent
- Oceania
- Country
- Samoa
- City
- Siutu
- Population
- 648
- Coordinates
- -13.72°, -172.60°
Seasonal Breakdown
Spring
Sep–Nov
Avg High 26°C
Avg Low 24°C
Rain 26 days/mo
1/3 best months
Summer
Dec–Feb
Avg High 27°C
Avg Low 24°C
Rain 28 days/mo
Autumn
Mar–May
Avg High 27°C
Avg Low 24°C
Rain 27 days/mo
Winter
Jun–Aug
Avg High 26°C
Avg Low 24°C
Rain 21 days/mo
3/3 best months
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 27°C / 24°C . Feb: 27°C / 24°C . Mar: 27°C / 25°C . Apr: 27°C / 25°C . May: 27°C / 24°C . Jun: 26°C / 24°C . Jul: 26°C / 24°C . Aug: 26°C / 23°C . Sep: 26°C / 23°C . Oct: 26°C / 24°C . Nov: 26°C / 24°C . Dec: 27°C / 24°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 384 mm. Feb: 502 mm. Mar: 191 mm. Apr: 236 mm. May: 193 mm. Jun: 107 mm. Jul: 148 mm. Aug: 115 mm. Sep: 105 mm. Oct: 210 mm. Nov: 251 mm. Dec: 340 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 85%. Feb: 86%. Mar: 84%. Apr: 85%. May: 86%. Jun: 86%. Jul: 85%. Aug: 85%. Sep: 85%. Oct: 86%. Nov: 85%. Dec: 85%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 15 km/h . Feb: 17 km/h . Mar: 13 km/h . Apr: 15 km/h . May: 17 km/h . Jun: 19 km/h . Jul: 21 km/h . Aug: 20 km/h . Sep: 20 km/h . Oct: 19 km/h . Nov: 16 km/h . Dec: 15 km/h .
Sunshine
Sunshine
Sunshine: Jan: 10h. Feb: 8h. Mar: 10h. Apr: 10h. May: 10h. Jun: 10h. Jul: 10h. Aug: 10h. Sep: 11h. Oct: 11h. Nov: 11h. Dec: 10h.
Sea Temperature
Sea Temperature
Line chart showing monthly sea temperature. Jan: 30°C . Feb: 30°C . Mar: 30°C . Apr: 30°C . May: 30°C . Jun: 29°C . Jul: 29°C . Aug: 28°C . Sep: 28°C . Oct: 29°C . Nov: 29°C . Dec: 30°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 8. Feb: UV 8. Mar: UV 9. Apr: UV 8. May: UV 7. Jun: UV 6. Jul: UV 7. Aug: UV 7. Sep: UV 9. Oct: UV 9. Nov: UV 9. Dec: UV 9.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending wetter by about 85 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | — | Mar · 27°C |
| Coldest month | — | Aug · 23°C |
| Wettest month | Feb 2025 · 638 mm | Feb · 502 mm |
| Windiest month | Sep 2025 · 22 km/h | Jul · 21 km/h |
Month-by-Month Weather Table
January
Wet 
February
Wet March
Wet April
Wet May
Wet June best
Wet July best
Wet August best
Wet September best
Wet October
Wet November
Wet December
Wet | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 27°C / 24°C | 32°C / 28°C | 29days (384 mm) Wet | 9.7h Good | 85% Humid | 8.3 Very High | Wet | View Details |
| February | 27°C / 24°C | 32°C / 28°C | 26days (502 mm) Wet | 8.2h Good | 86% Very Muggy | 7.7 Very High | Wet | View Details |
| March | 27°C / 25°C | 33°C / 28°C | 28days (191 mm) Wet | 10.4h Excellent | 84% Humid | 9 Very High | Wet | View Details |
| April | 27°C / 25°C | 32°C / 28°C | 28days (236 mm) Wet | 9.8h Good | 85% Humid | 7.7 Very High | Wet | View Details |
| May | 27°C / 24°C | 31°C / 28°C | 26days (193 mm) Wet | 9.7h Good | 86% Very Muggy | 6.5 High | Wet | View Details |
| June best | 26°C / 24°C | 29°C / 26°C | 22days (107 mm) Wet | 9.9h Good | 86% Very Muggy | 6.2 High | Wet | View Details |
| July best | 26°C / 24°C | 29°C / 26°C | 20days (148 mm) Wet | 9.9h Good | 85% Humid | 6.5 High | Wet | View Details |
| August best | 26°C / 23°C | 29°C / 25°C | 22days (115 mm) Wet | 10.4h Excellent | 85% Humid | 7.3 Very High | Wet | View Details |
| September best | 26°C / 23°C | 30°C / 26°C | 23days (105 mm) Wet | 10.9h Excellent | 85% Humid | 8.5 Very High | Wet | View Details |
| October | 26°C / 24°C | 31°C / 26°C | 27days (210 mm) Wet | 10.7h Excellent | 86% Very Muggy | 8.9 Very High | Wet | View Details |
| November | 26°C / 24°C | 32°C / 27°C | 27days (251 mm) Wet | 10.5h Excellent | 85% Humid | 8.8 Very High | Wet | View Details |
| December | 27°C / 24°C | 32°C / 28°C | 29days (340 mm) Wet | 10.1h Excellent | 85% Humid | 8.9 Very High | Wet | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Siutu are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Siutu, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Siutu is March, with average daytime highs of 27°C (81°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Siutu is August, with average overnight lows of 23°C (74°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Siutu is February, averaging 502mm of precipitation across 26 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Siutu runs through January, December, March, April, with the heaviest rainfall in January. Based on 10-year averages for Siutu.
Siutu receives approximately 120 sunshine hours per year. The sunniest month is September with around 11 hours. Based on climate data for Siutu.
The least favorable months to visit Siutu are January, February, November, December, primarily due to heavy rainfall, oppressive humidity. For the best conditions, consider June, July, August, September instead.
The annual average UV index in Siutu is 8, classified as high. SPF 30+ sunscreen, sunglasses, and seeking shade between 10:00–16:00 are strongly recommended.
Average humidity in Siutu is 85%, classified as humid. High humidity makes warm temperatures feel significantly hotter — lightweight, breathable clothing is recommended.
Yes — sea temperatures in January, February, March, April, May, June, July, August, September, October, November, December average 29°C (84°F), which is warm and comfortable for swimming and water activities.
Average wind speeds in Siutu are 17 km/h (11 mph). The windiest month is July with peak winds reaching 21 km/h (13 mph) (gusts up to 43 km/h / 26 mph).
Siutu averages 0 clear-sky days per month with overall cloud cover around 69%. The clearest skies occur in September.
The annual average dew point in Siutu 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.
Siutu has a Tropical Rainforest climate, classified as Af 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 Siutu ranges from 27°C (81°F) to 31°C (88°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 Siutu, with a climate score of 7.1/10. Consider visiting during June, July, August, September instead for better conditions.
For June in Siutu, pack Umbrella, Waterproof jacket, Waterproof shoes, Breathable clothing, Sunscreen (SPF 30+). With average highs of 26°C (79°F) and 22 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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