Climate Insights for Itanagar

The climate in Itanagar is warm and mild. The average annual temperature is 23°C and approximately 1981mm of precipitation falls per year. July is the wettest month, receiving around 360mm of rainfall. Itanagar is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, June, September. The coldest months are January, December, February, when temperatures can drop to 11°C.

Itanagar sees moderate temperature variation throughout the year, ranging from 11°C to 31°C. The warmest month is August, when average highs reach 31°C and the mean temperature sits around 28°C. January is the coolest month, with minimum temperatures around 11°C and an average of 15°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between October and November, with a 4°C shift in average temperatures.

Itanagar is a fairly wet location, receiving approximately 1981mm of precipitation annually, which averages out to around 165mm per month. The wettest month is July, averaging 360mm of rainfall. June and May also tend to see above-average precipitation. The driest month is December, with just 13mm. That's 347mm less than July, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Itanagar is relatively calm, with an average annual wind speed of 1km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 1km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 0km/h between the calmest and windiest months.

It is currently summer in Itanagar, which began on June 21, 2026. Itanagar is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 31°C, while the coldest stretch bottoms out in January near 11°C. Autumn is next, beginning on September 23, 2026 — 92 days from now.

The best time to visit Itanagar is during January, February, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 48mm per month. By contrast, August can be uncomfortably hot with temperatures reaching 31°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Itanagar based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.