The climate of Deogarh district is characterised by hot and dry summer, moist winter and distributed rains during the South-West monsoon season. Winter season commences from late November and lasts until the end of February. Summer season lasts from mid-March to mid-June. The South West monsoon hits Deogarh district during mid-June and rains continue up to late September. The months of October and November constitute the post monsoon season followed by the harvesting period.
Average annual rainfall in the district is 1582 millimetres of which about 86% is received during the South-West monsoon season and the rest rains are sporadic in nature occurring during pre-monsoon and post-monsoon period. July and August remain the wettest months. As per past available records, the year 1961 received the highest rainfall, which was 172% of the normal. The lowest annual rainfall of only 60% of the normal occurred consecutively for two years in 1923 and 1924. During monsoon, the sky remains overcast. In the concluding half of summer and post monsoon months clouding becomes moderate. In the rest of the year, sky remains generally clear or very thinly clouded.
Summer temperature begins to rise steadily from early March and remains at the peak until end of May or early June. The maximum temperature on an average remains about 41º Celsius and the average minimum temperature remains at about 26º Celsius. On hottest days prior to the advent of the South-West monsoon during May the maximum temperatures veers between 45º to 47º Celsius. With the onset of South-West monsoon around the second week of June, day temperature appreciably drops.
December and January are the coldest months of the year with the minimum temperature remaining between 7º and 12º Celsius. Due to the passing of western disturbances across North India during the winter months, short spells of extreme cold conditions prevail in the district and on certain occasions, the minimum temperature drops to about 4º Celsius.
Wind speed all across the district remains light to moderate throughout the year, with certain exceptions during summer when occasional of whirlwind is observed. In the post monsoon and winter season the wind direction is mainly from North and North-East towards South and South-West. On the onset of summer in early April, wind from the South-West and South become more common and this trend continues during the entire period from May to September.
During the monsoon season, depressions form in the Bay of Bengal across the East Coast of India including the coastline of Odisha move in Westerly direction causing widespread and heavy rain accompanied by strong wind and occasional cyclonic storms. The district experiences thunderstorms accompanied by lightening mostly in the afternoon in late summer and towards early October. The South-West monsoon rain is often associated with thundershowers and thunderbolts. Fog of moderate density occurs during the winter season.
The relative humidity is high during the South-West monsoon season being generally over 75 percent. After the monsoon season, humidity decreases and during the winter season, the air is salubrious. The driest part of the year is the summer season when the relative humidity is rather low, the afternoon humidity being generally about 25 to 30 percent.
