South Sikkim has a warm subtropical climate with warm summers and mild winters.
Temperatures peak in May and drop to their lowest in January, while rainfall is highest during summer months.
Humidity remains moderate throughout the year creating warm and dry conditions.
| Month | 🌤️ | Avg High | Avg Temp | Avg Low | Record High | Record Low | Humid % | Rain (mm) | Wind (m/s) | Solar (kWh/m²) |
|---|---|---|---|---|---|---|---|---|---|---|
| January | 🌤️ | 17.7°C | 12.3°C | 6.9°C | 23.4°C | 1.6°C | 49% | 5 | 1.1 | 3.47 |
| February | 🌤️ | 20.3°C | 14.3°C | 8.3°C | 27.6°C | 1.7°C | 42% | 12 | 1.4 | 3.81 |
| March | ☀️ | 24.8°C | 18.2°C | 11.6°C | 32.9°C | 3.7°C | 37% | 28 | 1.6 | 4.37 |
| April | ☀️ | 27.6°C | 21.3°C | 14.9°C | 34.6°C | 8.6°C | 43% | 60 | 1.6 | 4.90 |
| May | ☔ | 27.9°C | 22.6°C | 17.4°C | 34.9°C | 12.8°C | 62% | 127 | 1.4 | 4.86 |
| June | 🌧️ | 27.7°C | 23.6°C | 19.6°C | 33.1°C | 16.2°C | 77% | 244 | 1.4 | 4.61 |
| July | 🌧️ | 25.6°C | 22.7°C | 19.8°C | 30.5°C | 17.1°C | 89% | 391 | 1.4 | 4.15 |
| August | 🌧️ | 25.4°C | 22.5°C | 19.6°C | 30.2°C | 16.8°C | 89% | 297 | 1.3 | 4.10 |
| September | 🌧️ | 24.5°C | 21.5°C | 18.5°C | 28.7°C | 14.6°C | 88% | 219 | 1.1 | 3.90 |
| October | ☀️ | 23.1°C | 19.3°C | 15.6°C | 27.7°C | 10.7°C | 79% | 65 | 1.0 | 4.23 |
| November | ☀️ | 20.7°C | 16.2°C | 11.8°C | 26.3°C | 6.5°C | 66% | 6 | 0.9 | 3.90 |
| December | 🌤️ | 18.4°C | 13.5°C | 8.6°C | 23.8°C | 1.2°C | 56% | 4 | 1.0 | 3.48 |
Showing average climate conditions across 45 years (1981–2025)
🧥 Light layers are sufficient — this Mild Winter stays cool without prolonged hard freezes.
🌤️ Early mornings and evenings are most comfortable during this Hot Summer season.
☔ Heavy Rainfall expected — carry rain gear and plan outdoor activities around these months.
Monthly averages · 1981–2025 climate normals · °C
Temperatures rise steadily from spring, peak in May, and gradually decline through autumn into winter.
These seasonal patterns offer comfortable conditions year-round, with warm summers and mild winters.
Monthly rainfall · 1981–2025 seasonal trends · mm/month
Rainfall is concentrated in the summer months. Humidity stays moderate (around 65%), peaking during summer months, which creates warm and dry conditions.
☔ Heavy Rainfall expected — carry rain gear and plan outdoor activities around these months.
Monthly averages · 1981–2025
Across 45 years of records, South Sikkim's temperature has remained relatively stable over the past decade. Its hottest day reached 34.9°C in May 1994, and its coldest dropped to 1.2°C in December 2003. 2016 was the warmest year overall and 1982 the coolest.
The warmest year in South Sikkim's recorded history was 2016 (avg: 19.7°C), while the coldest was 1982 (avg: 18.4°C).
Average annual high/low · Last 30 years · °C
Total annual precipitation · Last 30 years · mm/year
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall (mm) | Avg Humidity | Avg Wind |
|---|---|---|---|---|---|---|---|---|
2025 | 23.0°C | 18.9°C | 14.9°C | 29.9°C | 4.9°C | 2113 | 75% | 1.2 m/s |
2024 | 23.1°C | 19.0°C | 14.9°C | 33.6°C | 4.1°C | 2761 | 73% | 1.3 m/s |
2023 | 23.4°C | 19.2°C | 14.9°C | 31.3°C | 5.5°C | 2181 | 71% | 1.2 m/s |
2022 | 22.6°C | 18.7°C | 14.8°C | 29.7°C | 2.4°C | 2381 | 78% | 1.2 m/s |
2021 | 23.0°C | 18.9°C | 14.8°C | 31.0°C | 5.1°C | 2364 | 72% | 1.2 m/s |
2020 🌧️ | 22.3°C | 18.5°C | 14.6°C | 29.1°C | 2.7°C | 2996 | 75% | 1.2 m/s |
2019 | 23.2°C | 18.9°C | 14.7°C | 30.6°C | 3.2°C | 1814 | 71% | 1.2 m/s |
2018 | 23.2°C | 18.8°C | 14.5°C | 29.1°C | 2.5°C | 1565 | 69% | 1.2 m/s |
2017 | 23.7°C | 19.5°C | 15.3°C | 31.2°C | 4.6°C | 1653 | 70% | 1.3 m/s |
2016 | 23.9°C | 19.7°C | 15.5°C | 33.2°C | 4.5°C | 1822 | 68% | 1.3 m/s |
Showing 1 to 10 of 45 years
Based on 45 years of data (1981–2025), May is typically the hottest month in South Sikkim, Sikkim, with average high temperatures around 27.9°C.
January is the coldest month in South Sikkim, with average low temperatures around 6.9°C.
July receives the most rainfall with approximately 391 mm, while December is the driest with 4 mm.
The highest recorded temperature was 34.9°C in May 1994. This is part of the historical record spanning 1981–2025.
The lowest recorded temperature was 1.2°C in December 2003.
This page covers 45 years of climate data from 1981 to 2025. As new data is added to the database the page automatically reflects the updated coverage.
South Sikkim receives the most sunlight in April with an average solar radiation of 4.90 kWh/m²/day. This solar radiation data, sourced from NASA POWER, is useful for solar energy planning and agriculture in Sikkim.
All climate data is sourced from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite and model data. It provides monthly averages for temperature, precipitation, humidity, wind speed, and solar radiation.
All weather data is sourced from NASA POWER (Prediction of Worldwide Energy Resources), a NASA project providing solar and meteorological data for renewable energy, building efficiency, and agricultural research.
