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Contents
- The climate of Karaj
- The best time to visit Karaj
- The worst time to visit Karaj
- Spring weather in Karaj
- Summer weather in Karaj
- Autumn weather in Karaj
- Winter weather in Karaj
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall days
- Average daylight
- Average sunshine
Climate and monthly weather forecast
The climate of Karaj
The climatic conditions of Karaj can be identified under the Köppen climate classification as Csa, indicative of a Mediterranean climate marked by hot summers. This Iranian city, situated in the northern part of the country near the southern slope of Alborz, is marked by a variation of climatic aspects throughout the year. With high temperatures ranging from 6.1°C (43°F) in January to 35.2°C (95.4°F) in July, and low temperatures from -2.5°C (27.5°F) to 19°C (66.2°F) during the same months, the weather exhibits substantial variations.
Rainfall in Karaj follows an atypical pattern, with clear contrast between different months. The beginning of the year is characterized by considerable rain, particularly in March, when 45mm (1.77") of rain is recorded. The rainfall plummets sharply in May, dropping to its minimum in August. Later in the year, precipitation begins to increase, reaching its peak in December at 34mm (1.34").
Daylight hours vary between 10 hours in January and gradually extend to the longest period of 14.6 hours in June, before shortening again. Sunshine hours also follow a similar trajectory, with the most sunshine recorded between June and August, where it exceeds 11 hours. Relative humidity fluctuates between 34% in summer months and 67% in winter months, signifying the dryness during the hot season.
Rainfall in Karaj follows an atypical pattern, with clear contrast between different months. The beginning of the year is characterized by considerable rain, particularly in March, when 45mm (1.77") of rain is recorded. The rainfall plummets sharply in May, dropping to its minimum in August. Later in the year, precipitation begins to increase, reaching its peak in December at 34mm (1.34").
Daylight hours vary between 10 hours in January and gradually extend to the longest period of 14.6 hours in June, before shortening again. Sunshine hours also follow a similar trajectory, with the most sunshine recorded between June and August, where it exceeds 11 hours. Relative humidity fluctuates between 34% in summer months and 67% in winter months, signifying the dryness during the hot season.
The best time to visit Karaj
From a climatological perspective, the most favorable time to visit Karaj is spring to early summer, specifically from April to June. During this period, visitors can enjoy moderate temperatures, with highs from 20.7°C (69.3°F) to 32.6°C (90.7°F) and lows from 8.4°C (47.1°F) to 16.5°C (61.7°F). Rainfall is relatively low, especially from May to June, with only 20mm (0.79") in May and 3mm (0.12") in June. This period also benefits from long daylight hours, extending up to 14.6 hours in June, and high sunshine hours, reaching up to 11.2 hours in June.
The worst time to visit Karaj
The less favorable time to travel to Karaj is from July to September when the city experiences the peak of its summer heat. Temperatures can reach up to 35.2°C (95.4°F) in July and are consistently above 30°C (86°F). Despite low rainfall during this time, the high temperatures could be overwhelming for outdoor activities. High temperatures are coupled with low relative humidity, descending to 34% in June and July, adding to discomfort.
Spring weather in Karaj
The spring in Karaj is characterized by a rise in temperatures, steadily transitioning from the cooler winter months. Specifically, average high temperatures rise from 14.2°C (57.6°F) in March to 26.2°C (79.2°F) in May, while low temperatures range from 3.2°C (37.8°F) to 12.2°C (54°F) during the same period. Rainfall lessens as spring progresses, from 45mm (1.77") in March to 20mm (0.79") in May. There is a considerable increase in daylight hours from 12 hours in March to 14.1 hours by the end of spring.
Summer weather in Karaj
Summers in Karaj are extremely hot and dry. Temperatures rise considerably with average highs rising to 35.2°C (95.4°F) in July, and average lows increase to 19°C (66.2°F). Rainfall is minimal, only 3mm (0.12") in July, before falling to 1mm (0.04") in August. Daylight in summer is abundant with an average of 14.3 hours in July and 13.5 hours in August. The humidity level is at its lowest during this time, even reaching 34%.
Autumn weather in Karaj
Autumn observes a slow drop in temperatures, with averaged high temperatures falling from 30.4°C (86.7°F) in September to 15.1°C (59.2°F) by November. Low temperatures exhibit a similar trend, from 15.3°C (59.5°F) to 4.8°C (40.6°F). Rainfall begins to increase gradually, from 2mm (0.08") in September to 28mm (1.1") in November. Daylight hours decrease steadily, falling from 12.4 hours in September to 10.3 hours by November.
Winter weather in Karaj
Winters in Karaj are relatively cool with average high temperatures falling to 6.1°C (43°F) in January, and low temperatures can plummet to -2.5°C (27.5°F). Rainfall is frequent with average rainfall crossing 30mm (1.18") in December and January. Daylight hours are limited to around 10 hours while sunshine hours decrease to around 5.1 hours in December.
Weather in January
Weather in Karaj, Iran, starts the year on a cold note with January, as winter's grip remains firm. Frosts are common, as nighttime lows can dip as far as -2.5°C (27.5°F), being indicative of slightly harsher cold extremes than the neighboring December's low-end of 0.3°C (32.5°F). Weather in January »
Weather in February
February marks a subtle, yet noticeable, transition in the characteristics of the Karaj weather. The biting cold of January begins to wane, and temperatures elevate a bit, albeit still remaining within the lower spectrum. The month experiences the highest snowfall days compared to any other, with a count of 3.7. Weather in February »
Weather in March
As Karaj steps into March, the city starts warming up, indicative of the advent of spring. The snowy facades that added to Karaj's glamour in February begin to thaw, making way for vibrant greenery. Although March still echoes some winter reminiscence, the gradual increase in temperatures can be felt. Weather in March »
Weather in April
In Karaj, April pushes winter further away, introducing warmer weather and longer daylight hours. The shrubs and trees begin to blossom under the increasingly luminous sun. Compared to March, April conditions are drier, making way for more outdoor activities. Weather in April »
Weather in May
May in Karaj is synonymous with the onset of summer and brings with it all the joys associated with warm weather. Spring's leftover petals make way for summer blooms, gracing the city with a wide spectrum of colors. The land starts absorbing more sunlight and temperatures steadily rise, heralding the arrival of the summer season. Weather in May »
Weather in June
June marks the true beginning of summer in Karaj, with ascending temperatures making the city come alive with warmth. Sunny spells become more frequent, allowing residents to enjoy outdoor activities to the fullest. Karaj faces its most arid time of year, with only a scant 3mm (0.12") falling from the skies all month. Weather in June »
Weather in July
In July, Karaj experiences the peak of the summer season with temperatures reaching a scorching monthly average high of 35.2°C (95.4°F). Above all months, July offers the most sun-drenched days, with an average of 14.3 daylight hours, enhancing the city's vibrant complexion. Weather in July »
Weather in August
August in Karaj continues to sizzle, maintaining the energy of July's summer fever, albeit with a slight reduction in average temperatures. As the month progresses, the daily sunshine hours begin to shorten, indicating the sun's slow retreat. Weather in August »
Weather in September
September signifies the transition from the heat of summer to the profitability of autumn in Karaj. Temperatures start to cool down and the city begins to embrace milder weather. September's claim to fame in Karaj is having the least amount of precipitation, with a slim rainfall of 2mm (0.08") to its name. Weather in September »
Weather in October
October infuses a noticeable change in Karaj's weather, as the city moves into autumn's embrace. The mercury column starts to drop quite significantly, and the landscapes transform into a canvas painted with burnt gold and rusty hues. Weather in October »
Weather in November
November brings about an air of change in Karaj as autumn begins to make way for the impending winter. The city's foliage turns from fiery reds and oranges to bare branches, signaling a transition in weather. There's a significant shift towards cooler temperatures, and the decreasing daylight hours emphasize the fading warmth. Weather in November »
Weather in December
Finally, Karaj welcomes December, a month characterized by the first signs of snow and the return of winter. With the mercury often dipping down to the bare minimum of the year at 0.3°C (32.5°F), there's no denial of winter's arrival. Weather in December »
Updated: Jan 27, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month in Karaj?
With an average high-temperature of 6.1°C (43°F) and an average low-temperature of -2.5°C (27.5°F), January is the coldest month in Karaj.
What is the most humid month in Karaj?
January is the most humid month in Karaj, Iran, with an average relative humidity of 67%.
How many days does it rain in Karaj?
In Karaj, Iran, during the entire year, the rain falls for 44.3 days and collects up to 252mm (9.92") of precipitation.
When does it snow in Karaj?
Months with snowfall in Karaj are January through April, November and December.
When does it snow the most in Karaj?
January has the most snowfall days of the year in Karaj. Snow falls for 5.4 days.
How many days does it snow in Karaj?
Throughout the year, there are 14.3 snowfall days.
What is the rainiest month in Karaj?
The month with the most rainfall in Karaj, Iran, is March, when the rain falls for 6.7 days and typically aggregates up to 45mm (1.77") of precipitation.
When it does not snow in Karaj?
May through October are months without snowfall.
What is the least humid month in Karaj?
June and August, with an average relative humidity of 34%, are the least humid months in Karaj.
When are the longest days in Karaj?
The month with the longest days is June, with an average of 14h and 30min of daylight.
What month has the most sunshine in Karaj?
June has the most sunshine of the year in Karaj, with an average of 11.2h of sunshine.
What month is the hottest in Karaj?
Temperature readings in Karaj, Iran, reach their annual highs in July, averaging 35.2°C (95.4°F) and a minimum average of 19°C (66.2°F).
What is the driest month in Karaj?
The month with the least rainfall is August, when the rain falls for 0.3 days and typically collects 1mm (0.04") of precipitation.
What is the month with the shortest days in Karaj?
The month with the shortest days in Karaj, Iran, is December, with an average of 9h and 48min of daylight.
Is there Daylight Saving Time (DST) in Karaj?
Karaj does not utilize Daylight Saving Time (DST). +0330 timezone is used throughout the entire year.
What is the month with the least sunshine in Karaj?
December has the least sunshine of the year, with an average of 5.1h of sunshine.
Average temperature
Karaj, Iran
The warmest month (with the highest average high temperature) is July (35.2°C).
The month with the lowest average high temperature is January (6.1°C).
The month with the highest average low temperature is August (19.1°C).
The coldest month (with the lowest average low temperature) is January (-2.5°C).
Average humidity
Karaj, Iran
The month with the highest relative humidity is January (67%).
The months with the lowest relative humidity are June and August (34%).
Average rainfall
Karaj, Iran
- Average rainfall in January:
30.8mm - Average rainfall in February:
32.1mm - Average rainfall in March:
45.4mm - Average rainfall in April:
39.1mm - Average rainfall in May:
19.5mm - Average rainfall in June:
2.7mm
- Average rainfall in July:
3mm - Average rainfall in August:
1.2mm - Average rainfall in September:
1.6mm - Average rainfall in October:
15.1mm - Average rainfall in November:
27.7mm - Average rainfall in December:
33.5mm
The wettest month (with the highest rainfall) is March (45.4mm).
The driest month (with the least rainfall) is August (1.2mm).
Average rainfall days
Karaj, Iran
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
5.7 days - Average rainfall days in March:
6.7 days - Average rainfall days in April:
5.8 days - Average rainfall days in May:
3.7 days - Average rainfall days in June:
1 days
- Average rainfall days in July:
0.7 days - Average rainfall days in August:
0.3 days - Average rainfall days in September:
0.3 days - Average rainfall days in October:
3.2 days - Average rainfall days in November:
4.8 days - Average rainfall days in December:
5.8 days
The month with the highest number of rainy days is March (6.7 days).
The months with the least rainy days are August and September (0.3 days).
Average snowfall days
Karaj, Iran
- Average snowfall days in January:
5.4 days - Average snowfall days in February:
3.7 days - Average snowfall days in March:
1.9 days - Average snowfall days in April:
0.1 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.5 days - Average snowfall days in December:
2.7 days
The month with the highest number of snowfall days is January (5.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Karaj, Iran
- Average daylight in January:
10h and 0min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 1min - Average daylight in June:
14h and 3min
- Average daylight in July:
14h and 2min - Average daylight in August:
13h and 3min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 2min - Average daylight in November:
10h and 2min - Average daylight in December:
9h and 5min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in January:
5h and 2min - Average sunshine in February:
6h and 1min - Average sunshine in March:
6h and 2min - Average sunshine in April:
7h and 2min - Average sunshine in May:
9h and 1min - Average sunshine in June:
11h and 1min
- Average sunshine in July:
11h and 0min - Average sunshine in August:
11h and 0min - Average sunshine in September:
10h and 1min - Average sunshine in October:
8h and 1min - Average sunshine in November:
6h and 1min - Average sunshine in December:
5h and 1min
The month with the most sunshine is June (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
