Yearly & Monthly weather

The climate of Patna

In geographical terms, Patna, situated on the southern bank of the Ganges River in India, is mainly influenced by a Humid subtropical dry winter climate, denoted by the Köppen climate classification code "Cwa". Weather patterns in this city vary markedly throughout the year. Uniquely, maximum and copious rainfalls are observed in the monsoon months, arriving between June and September. Whereas, temperatures show significant differences throughout the year, ranging between 9.3°C (48.7°F) lows in January to 38.4°C (101.1°F) highs in May.

Specifically, rainfall distribution is an integral feature, with maximum rainfall between June and September, dramatically dropping from 381mm (15") in July to 79mm (3.11") in October. Relative to this, there are 14.9 rainy days in July, compared with less than 1 from November to February. Therefore, monsoon and post-monsoon periods show concentrated rainfalls, giving Patna a distinctive weather pattern.

Daylight and sunshine hours follow a more uniform pattern, fluctuating between 10.6 hours in December to 13.7 hours in June. Concurrently, sunshine hours are around 7, reaching up to 9 hours in April — a certainty of long bright days throughout most of the year. UV index also shows changes, peaking at 12 between June and August, indicating a need for sun protection during those hot summers.

The best time to visit Patna

Owing to warm, sunny days and comfortable temperatures, the period from October to December proves the optimal time to visit Patna. October experiences highs of 31.7°C (89.1°F) and rainfall decreases dramatically from 229mm (9.02") in September to 79mm (3.11"). This results in only 3.3 rainy days in October, letting visitors enjoy clear, comfortable weather conditions.

The worst time to visit Patna

Patna's months of July and August present significant challenges for visitors due to extreme weather conditions. In July, highs of 32.9°C (91.2°F) combined with high rainfall of 381mm (15") to make it an unbearable time to explore the city. August is no different, with rainfall slightly decreasing to 282mm (11.1"), yet high temperatures still persist around 32.5°C (90.5°F). Accordingly, these months are not ideal to plan a visit to the region.

Spring weather in Patna

Spring in Patna, between March and May, is hot and dry with gradually rising temperatures. Average highs vary from 32.4°C (90.3°F) in March to a peak of 38.4°C (101.1°F) in May. Correspondingly, low temperatures increase from 16.4°C (61.5°F) to 25.1°C (77.2°F), making nights warmer. Average rainfall ranges from a low 9mm (0.35") in March to 38mm (1.5") in May with daylight hours stretched to approximately 13 towards the end of Spring.

Summer weather in Patna

Summer in Patna spans from June to August and is characterized by the combination of high temperatures and abundant rainfall due to monsoon activity. Daily high temperatures hover around 33 to 37°C (98.6°F), while the average low temperatures stay around 26°C (78.8°F) providing no cool respite at night. Heavy rainfall begins in June and peaks dramatically to 381mm (15") in July, resulting in 14.9 rainy days.

Autumn weather in Patna

Autumn occurs in Patna from September to November. Temperatures start falling from an average high of 32.2°C (90°F) in September to 28.9°C (84°F) in November. Correspondingly, the lows show a fall from 25.3°C (77.5°F) to a more pleasant 14.8°C (58.6°F). Rainfall sees a drastic reduction, from 229mm (9.02") in September to a scanty 9mm (0.35") in November. This period presents significantly less rainfall days, less humid, and milder temperatures making this season pleasant.

Winter weather in Patna

From December to February, winter season befalls upon Patna, with dropping temperatures but predominantly dry conditions. Temperatures decrease from an average high of 24.6°C (76.3°F) in December to a low of 23°C (73.4°F) in January. The average low temperature varies from 10.1°C (50.2°F) in December to 9.3°C (48.7°F) in January, making it the coldest time of the year. Rainfall is lowest in this season, ranging from 12mm (0.47") in December to 7mm (0.28") in February, with less than 1.5 days of rainfall per month.

Weather in January

The start of the calendar year in Patna blesses residents and visitors with a cool, comfortable climate. Daylight spans roughly half the day, making outdoor adventures quite enjoyable. Nights become surprisingly fresh, dropping to a cool 9.3°C (48.7°F) — a marked difference when compared to the daytime temperatures. Weather in January »

Weather in February

As observed in Patna, February carries over the pleasant weather from January with gradually rising temperatures. The number of daylight hours increase, resulting in extended opportunities to partake in outdoor activities. The weather transition is not steep, with the overall precipitation levels climbing to 14mm (0.55"), giving February an added advantage for outdoor enthusiasts. Weather in February »

Weather in March

March marks the official start of spring in Patna, accompanied by a further escalation in temperature. The increasing intensity of the sun during daylight hours is countered by the moderate rainfall witnessed in March, totaling to 9mm (0.35"). Weather in March »

Weather in April

April is characterized by a dramatic escalation in temperatures, marking the start of peak summer. An incremental increase in daylight hours facilitates extended outdoor activities, though the heat can be overwhelmingly intense at times. Weather in April »

Weather in May

May presents the pinnacle of Patna's summer, reaching a scorching maximum temperature of up to 38.4°C (101.1°F). Despite the harsh, sweltering days, life continues to thrive in this vibrant city. The longer daylight hours, albeit hot, are complemented by an increase in precipitation - a welcoming sight amidst the heat. Weather in May »

Weather in June

With the onset of June, Patna ushers in the eagerly anticipated monsoon season. The intensity of the sunlight decreases slightly, providing a much-needed break from the summer heat. The cooling showers bring an enormous relief, painting the city with a fresh, revitalizing hue. Weather in June »

Weather in July

July features prominent monsoon weather, with rainfall reaching its annual peak at 381mm (15"). As the torrential downpours dominate Patna's weather scene, the daytime temperature gradually diminshes, making July comparatively cooler than the preceding months. Weather in July »

Weather in August

August retains the monsoon flavor with heavy rainfall, albeit slightly reduced to 282mm (11.1") from July's peak. The skies often exhibit a mystical mix of clouds and sun, creating awe-inspiring vistas for onlookers. While the daytime heat gradually diminishes, nights witness a slight dip in temperature. Weather in August »

Weather in September

With the retreat of the monsoon, September experiences a visible reduction in rainfall to 229mm (9.02"). The weather begins to dry up gradually as the rainfall recedes, yet the city remains bathed in the lush of monsoon’s greenery. Weather in September »

Weather in October

October in Patna heralds the arrival of autumn. The city basks in the moderate sunlight, an inviting change from the intense summer heat and heavy monsoon rains. Day and night temperatures show a noticeable drop, letting residents enjoy a period of soothing climate. Weather in October »

Weather in November

November showcases the climatic transition to winter, with a substantial drop in both day and night temperatures. Despite Patna's tropical nature, November sends the first signals of the approaching winter. Gentle sunlight during the shorter days and cool nights make November pleasantly enjoyable. Weather in November »

Weather in December

December sees Patna immersed in the palpable chill of winter, proving to be the ultimate relief from a year of rising and dipping temperatures. The daylight hours dwindle, further enhancing the cool, soothing vibe. Sharp drops in temperature, down to lows of 10.1°C (50.2°F), and bare minimum rainfall of 7mm (0.28") make December the true embodiment of winter. Weather in December »

Updated: Jan 26, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the coldest in Patna?

Patna's coldest month, January, generally records average temperatures ranging from a high of 23°C (73.4°F) to a low of 9.3°C (48.7°F).

How many days does it rain in Patna?

Throughout the year, there are 55.9 rainfall days, and 1213mm (47.76") of precipitation is accumulated.

What month has the most sunshine in Patna?

April has the most sunshine of the year in Patna, with an average of 9h of sunshine.

What month is the hottest in Patna?

Patna experiences its average highest temperatures in May, reaching a peak of 38.4°C (101.1°F) and a minimum of 25.1°C (77.2°F).

When is the highest UV index in Patna?

The months with the highest UV index in Patna are May through August, with an average maximum UV index of 12.

When are the longest days in Patna?

With an average of 13h and 42min of daylight, June has the longest days of the year in Patna, India.

What is the rainiest month in Patna?

The month with the most rainfall is July, when the rain falls for 14.9 days and typically aggregates up to 381mm (15") of precipitation.

What is the month with the least sunshine in Patna?

July has the least sunshine of the year in Patna, with an average of 3h of sunshine.

What is the driest month in Patna?

The month with the least rainfall in Patna, India, is December, when the rain falls for 0.7 days and typically collects 7mm (0.28") of precipitation.

What is the month with the shortest days in Patna?

The month with the shortest days is December, with an average of 10h and 36min of daylight.

Is there Daylight Saving Time (DST) in Patna?

Patna, India, does not observe Daylight Saving Time (DST). IST timezone is used over the entire year.

What is the month with the lowest UV index in Patna?

With an average maximum UV index of 5, December is the month with the lowest UV index.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N D

Average temperature
Patna, India

Average high temperature in January:
23°C
Average high temperature in February:
26.1°C
Average high temperature in March:
32.4°C
Average high temperature in April:
37.4°C
Average high temperature in May:
38.4°C
Average high temperature in June:
36.7°C

Average high temperature in July:
32.9°C
Average high temperature in August:
32.5°C
Average high temperature in September:
32.2°C
Average high temperature in October:
31.7°C
Average high temperature in November:
28.9°C
Average high temperature in December:
24.6°C

The warmest month (with the highest average high temperature) is May (38.4°C).
The month with the lowest average high temperature is January (23°C).

Average low temperature in January:
9.3°C
Average low temperature in February:
11.6°C
Average low temperature in March:
16.4°C
Average low temperature in April:
22.1°C
Average low temperature in May:
25.1°C
Average low temperature in June:
26.7°C

Average low temperature in July:
26.1°C
Average low temperature in August:
26.1°C
Average low temperature in September:
25.3°C
Average low temperature in October:
21.6°C
Average low temperature in November:
14.8°C
Average low temperature in December:
10.1°C

The month with the highest average low temperature is June (26.7°C).
The coldest month (with the lowest average low temperature) is January (9.3°C).

Average rainfall
Patna, India

The wettest month (with the highest rainfall) is July (381mm).
The driest month (with the least rainfall) is December (7mm).

Average rainfall days
Patna, India

Average rainfall days in January:
1.3 days
Average rainfall days in February:
1.2 days
Average rainfall days in March:
0.7 days
Average rainfall days in April:
1 days
Average rainfall days in May:
2.7 days
Average rainfall days in June:
6.5 days

Average rainfall days in July:
14.9 days
Average rainfall days in August:
12.8 days
Average rainfall days in September:
10.2 days
Average rainfall days in October:
3.3 days
Average rainfall days in November:
0.6 days
Average rainfall days in December:
0.7 days

The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is November (0.6 days).

Average daylight / Average sunshine
Patna, India

Average daylight in January:
10h and 4min
Average daylight in February:
11h and 2min
Average daylight in March:
12h and 0min
Average daylight in April:
12h and 5min
Average daylight in May:
13h and 2min
Average daylight in June:
13h and 4min

Average daylight in July:
13h and 4min
Average daylight in August:
13h and 0min
Average daylight in September:
12h and 2min
Average daylight in October:
11h and 4min
Average daylight in November:
10h and 5min
Average daylight in December:
10h and 4min

The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 36min).

The month with the most sunshine is April (Average sunshine: 9h).
The month with the least sunshine is July (Average sunshine: 3h).

Average UV index
Patna, India

The months with the highest UV index are May, June, July and August (UV index 12).
The month with the lowest UV index is December (UV index 5).

Climate and monthly weather forecastPatna, India

Contents