Sima, Comoros experiences average highs of 28°C (82°F) and lows of 23°C (73°F) throughout the year. Rainfall is frequent, averaging about 15 rainy days per month. Sunshine is abundant, averaging about 11 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.
Sima, Comoros Weather & Climate 2026
Monthly climate averages for Sima, Comoros. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: May–Oct 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
6.4/10
Best: June, July, August, September
UV Index
8
High
Temperature 28°C / 23°C
Feels Like 32°C / 26°C
Rainy Days 15
Rainfall 94 mm
Sunshine 11 h
Humidity 77%
Wind Speed 16 km/h
Dew Point 22°C
Hottest Month
29°C
December
Avg Low25°C
Rain20days
Coldest Month
21°C
August
Avg High27°C
Rain7days
Driest Month
5days
July
Avg High27°C
Avg Low22°C
Windiest Month
22 km/h
July (Gusts 39)
Sea Temperature
26°C – 30°C
Warmest water: April (
30.1°C
)
Worst Time to Visit
Consider avoiding January, February, March, December due to heavy rainfall, oppressive humidity.
Sun Position
Sunrise 06:22
Daylight 11.4h
Sunset 17:47
Live conditions—
Sima on the map · live conditions
Sima, Comoros
- Continent
- Africa
- Country
- Comoros
- City
- Sima
- Population
- 8.7K
- Coordinates
- -12.20°, 44.28°
Seasonal Breakdown
Spring
Sep–Nov
Avg High 28°C
Avg Low 23°C
Rain 13 days/mo
1/3 best months
Summer
Dec–Feb
Avg High 29°C
Avg Low 25°C
Rain 22 days/mo
Autumn
Mar–May
Avg High 29°C
Avg Low 25°C
Rain 18 days/mo
Winter
Jun–Aug
Avg High 27°C
Avg Low 22°C
Rain 7 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: 29°C / 25°C . Feb: 29°C / 25°C . Mar: 29°C / 25°C . Apr: 29°C / 25°C . May: 28°C / 24°C . Jun: 27°C / 23°C . Jul: 27°C / 22°C . Aug: 27°C / 21°C . Sep: 28°C / 21°C . Oct: 28°C / 23°C . Nov: 29°C / 24°C . Dec: 29°C / 25°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 261 mm. Feb: 200 mm. Mar: 165 mm. Apr: 125 mm. May: 38 mm. Jun: 25 mm. Jul: 16 mm. Aug: 20 mm. Sep: 29 mm. Oct: 47 mm. Nov: 71 mm. Dec: 125 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 83%. Feb: 84%. Mar: 83%. Apr: 82%. May: 76%. Jun: 73%. Jul: 71%. Aug: 73%. Sep: 73%. Oct: 75%. Nov: 77%. Dec: 79%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 17 km/h . Feb: 15 km/h . Mar: 13 km/h . Apr: 15 km/h . May: 20 km/h . Jun: 21 km/h . Jul: 22 km/h . Aug: 18 km/h . Sep: 14 km/h . Oct: 13 km/h . Nov: 12 km/h . Dec: 12 km/h .
Sunshine
Sunshine
Sunshine: Jan: 10h. Feb: 10h. Mar: 10h. Apr: 10h. May: 10h. Jun: 10h. Jul: 10h. Aug: 11h. Sep: 11h. Oct: 12h. Nov: 12h. Dec: 11h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 29°C . Feb: 30°C . Mar: 30°C . Apr: 30°C . May: 29°C . Jun: 28°C . Jul: 27°C . Aug: 26°C . Sep: 27°C . Oct: 28°C . Nov: 29°C . Dec: 29°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 9. Feb: UV 9. Mar: UV 9. Apr: UV 8. May: UV 7. Jun: UV 7. Jul: UV 7. Aug: UV 8. 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 drier by about 28 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Dec 2025 · 30°C | Dec · 29°C |
| Coldest month | Aug 2025 · 21°C | Aug · 21°C |
| Wettest month | Jan 2025 · 181 mm | Jan · 261 mm |
| Windiest month | Jul 2025 · 22 km/h | Jul · 22 km/h |
Month-by-Month Weather Table
January
Wet 
February
Wet March
Wet April
Wet May
Good June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Good November
Fair December
Wet | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 29°C / 25°C | 34°C / 28°C | 23days (261 mm) Wet | 9.5h Good | 83% Humid | 8.5 Very High | Wet | View Details |
| February | 29°C / 25°C | 34°C / 29°C | 24days (200 mm) Wet | 9.9h Good | 84% Humid | 9.1 Very High | Wet | View Details |
| March | 29°C / 25°C | 35°C / 29°C | 23days (165 mm) Wet | 10.3h Excellent | 83% Humid | 8.8 Very High | Wet | View Details |
| April | 29°C / 25°C | 35°C / 29°C | 21days (125 mm) Wet | 10.3h Excellent | 82% Humid | 8 Very High | Wet | View Details |
| May | 28°C / 24°C | 31°C / 26°C | 10days (38 mm) Wet | 10.4h Excellent | 76% Humid | 6.9 High | Good | View Details |
| June best | 27°C / 23°C | 29°C / 24°C | 8days (25 mm) Wet | 10.1h Excellent | 73% Muggy | 6.6 High | Excellent | View Details |
| July best | 27°C / 22°C | 28°C / 23°C | 5days (16 mm) Good | 10.3h Excellent | 71% Muggy | 6.9 High | Excellent | View Details |
| August best | 27°C / 21°C | 29°C / 23°C | 7days (20 mm) Good | 10.8h Excellent | 73% Muggy | 7.8 Very High | Excellent | View Details |
| September best | 28°C / 21°C | 31°C / 24°C | 11days (29 mm) Wet | 11.2h Excellent | 73% Muggy | 8.6 Very High | Excellent | View Details |
| October | 28°C / 23°C | 33°C / 26°C | 13days (47 mm) Wet | 11.5h Excellent | 75% Muggy | 9.3 Very High | Good | View Details |
| November | 29°C / 24°C | 35°C / 28°C | 16days (71 mm) Wet | 11.6h Excellent | 77% Humid | 9.3 Very High | Fair | View Details |
| December | 29°C / 25°C | 35°C / 29°C | 20days (125 mm) Wet | 11.4h Excellent | 79% Humid | 9.2 Very High | Wet | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Sima are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Sima, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Sima is December, with average daytime highs of 29°C (85°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Sima is August, with average overnight lows of 21°C (70°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Sima is January, averaging 261mm of precipitation across 23 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Sima runs through February, January, March, April, with the heaviest rainfall in February. Based on 10-year averages for Sima.
Sima receives approximately 127 sunshine hours per year. The sunniest month is November with around 12 hours. Based on climate data for Sima.
The least favorable months to visit Sima are January, February, March, December, primarily due to heavy rainfall, oppressive humidity. For the best conditions, consider June, July, August, September instead.
The annual average UV index in Sima is 8, classified as high. SPF 30+ sunscreen, sunglasses, and seeking shade between 10:00–16:00 are strongly recommended.
Average humidity in Sima is 77%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes — sea temperatures in January, February, March, April, May, June, July, August, September, October, November, December average 28°C (82°F), which is warm and comfortable for swimming and water activities.
Average wind speeds in Sima are 16 km/h (10 mph). The windiest month is July with peak winds reaching 22 km/h (14 mph) (gusts up to 39 km/h / 24 mph).
Sima averages 6 clear-sky days per month with overall cloud cover around 47%. The clearest skies occur in August.
The annual average dew point in Sima 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.
Sima 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 Sima ranges from 26°C (79°F) to 32°C (90°F) on average. Humidity and radiant heat mean it often feels warmer than the thermometer reads, especially in summer months.
Yes, June is a great time to visit Sima. It earns a climate score of 9.3/10 with Excellent.
For June in Sima, pack Umbrella, Breathable clothing, Sunscreen (SPF 30+), Sun hat, Sunglasses. With average highs of 27°C (81°F) and 8 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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