Climate and monthly weather forecastJefferson, LA
Climate and monthly weather forecast
Weather in January
January, like December, is another mild winter month in Jefferson, Louisiana, with an average temperature varying between 47.8°F (8.8°C) and 60.4°F (15.8°C). The coldest month is January, with an average high-temperature of 60.4°F (15.8°C) and an average low-temperature of 47.8°F (8.8°C). Weather in January »Weather in February
February, the last month of the winter in Jefferson, is a refreshing month, with an average temperature varying between 52.5°F (11.4°C) and 64.4°F (18°C). Jefferson's average high-temperature marks an enjoyable 64.4°F (18°C) with the advent of February, closely mirroring that of the preceding month. Weather in February »Weather in March
March, the first month of the spring in Jefferson, is a pleasant month, with temperature in the range of an average high of 70.7°F (21.5°C) and an average low of 57.7°F (14.3°C). A minor escalation in the average high-temperature is seen with the onset of March, moving from a refreshing 64.4°F (18°C) in February to an agreeable 70.7°F (21.5°C). Weather in March »Weather in April
April in Jefferson, Louisiana, is a warm spring month, with an average temperature fluctuating between 63.5°F (17.5°C) and 76.6°F (24.8°C). The start of April signals a slight increase in the average high-temperature, moving from an agreeable 70.7°F (21.5°C) in March to a moderately hot 76.6°F (24.8°C). Weather in April »Weather in May
May, the last month of the spring in Jefferson, is another warm month, with temperature in the range of an average low of 70.9°F (21.6°C) and an average high of 82.9°F (28.3°C). In Jefferson, the onset of May comes with a modest high-temperature shift, transitioning from April's moderately hot 76.6°F (24.8°C) to a still warm 82.9°F (28.3°C). Weather in May »Weather in June
June, the first month of the summer in Jefferson, is a hot month, with an average temperature ranging between max 88.3°F (31.3°C) and min 77°F (25°C). The onset of June brings a minor temperature shift, with the average high-temperature moving from a warm 82.9°F (28.3°C) in May to a hot 88.3°F (31.3°C). Weather in June »Weather in July
July, the same as June, in Jefferson, Louisiana, is a hot summer month, with an average temperature varying between 78.4°F (25.8°C) and 89.2°F (31.8°C). Jefferson records the warmest temperatures in July, averaging a high of 89.2°F (31.8°C) and a low of 78.4°F (25.8°C). For most parts of July, the heat index is computed to be an extremely hot 107.6°F (42°C). Weather in July »Weather in August
August, the last month of the summer in Jefferson, is also a hot month, with an average temperature fluctuating between 89.1°F (31.7°C) and 79°F (26.1°C). Upon the beginning of August, Jefferson's high-temperatures register at a still hot 89.1°F (31.7°C), closely mirroring the preceding month. Weather in August »Weather in September
September, the first month of the autumn in Jefferson, is still a tropical month, with an average temperature varying between 75.2°F (24°C) and 86.5°F (30.3°C). With September's advent, Jefferson, Louisiana, sees an average high-temperature of a still tropical 86.5°F (30.3°C), subtly shifted from August's 89.1°F (31.7°C). Weather in September »Weather in October
October, like September, in Jefferson, Louisiana, is a moderately hot autumn month, with an average temperature varying between 78.4°F (25.8°C) and 66.6°F (19.2°C). October's onset corresponds with a subtle shift in the average high-temperature, slightly moving from a hot 86.5°F (30.3°C) in September to a moderately hot 78.4°F (25.8°C). Weather in October »Weather in November
November, the last month of the autumn in Jefferson, is another pleasant month, with an average temperature ranging between max 68.9°F (20.5°C) and min 56.5°F (13.6°C). A shift in Jefferson's weather is observed as October turns into November, with the average high temperature reducing from a warm 78.4°F (25.8°C) to an agreeable 68.9°F (20.5°C). Weather in November »Weather in December
December, the first month of the winter in Jefferson, is still a comfortable month, with temperature in the range of an average low of 52°F (11.1°C) and an average high of 63.3°F (17.4°C). With the onset of December, Jefferson's average high-temperature slightly adjusts, moderately receding from November's pleasant 68.9°F (20.5°C) to a comfortable 63.3°F (17.4°C). Weather in December »Updated: Aug 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
With average temperatures fluctuating between a high of 60.4°F (15.8°C) and a low of 47.8°F (8.8°C), January stands out as the coldest month.
In Jefferson, during the entire year, the rain falls for 104.1 days and collects up to 8.39" (213mm) of precipitation.
March is the month with the least rainfall. Rain falls for 8.1 days and accumulates 0.39" (10mm) of precipitation.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
The months with the highest UV index are May through September, with an average maximum UV index of 7.
With an average of 14h and 0min of daylight, June has the longest days of the year.
With an average of 11h of sunshine, June has the most sunshine of the year.
The warmest period is July, when temperatures fluctuate between an average high of 89.2°F (31.8°C) and a low of 78.4°F (25.8°C).
July is the month with the most rainfall. Rain falls for 13.3 days and accumulates 1.3" (33mm) of precipitation.
October is the least humid month, with an average relative humidity of 71%.
With an average relative humidity of 78%, December is the most humid month.
December has the shortest days of the year, with an average of 10h and 18min of daylight.
December has the least sunshine of the year, with an average of 5.1h of sunshine.
The month with the lowest UV index is December, with an average maximum UV index of 3.
Average temperature
Jefferson, LA
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (60.4°F).
The month with the highest average low temperature is August (79°F).
The coldest month (with the lowest average low temperature) is January (47.8°F).
Average pressure
Jefferson, LA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
30"Hg - Average pressure in May:
29.99"Hg - Average pressure in June:
29.97"Hg
- Average pressure in July:
30.01"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
29.97"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.97"Hg).
Average wind speed
Jefferson, LA
- Average wind speed in January:
9.4mph - Average wind speed in February:
9.5mph - Average wind speed in March:
9.3mph - Average wind speed in April:
9.5mph - Average wind speed in May:
8mph - Average wind speed in June:
7.1mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.5mph - Average wind speed in September:
6.9mph - Average wind speed in October:
8.3mph - Average wind speed in November:
8.9mph - Average wind speed in December:
9.3mph
The windiest months (with the highest average wind speed) are February and April (9.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity
Jefferson, LA
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Jefferson, LA
- Average rainfall in January:
0.43" - Average rainfall in February:
0.51" - Average rainfall in March:
0.39" - Average rainfall in April:
0.47" - Average rainfall in May:
0.75" - Average rainfall in June:
0.87"
- Average rainfall in July:
1.3" - Average rainfall in August:
1.14" - Average rainfall in September:
0.43" - Average rainfall in October:
0.87" - Average rainfall in November:
0.51" - Average rainfall in December:
0.71"
The wettest month (with the highest rainfall) is July (1.3").
The driest month (with the least rainfall) is March (0.39").
Average rainfall days
Jefferson, LA
- Average rainfall days in January:
5.3 days - Average rainfall days in February:
7.2 days - Average rainfall days in March:
8.1 days - Average rainfall days in April:
6.8 days - Average rainfall days in May:
8.6 days - Average rainfall days in June:
11.5 days
- Average rainfall days in July:
13.3 days - Average rainfall days in August:
14.8 days - Average rainfall days in September:
10.9 days - Average rainfall days in October:
5.9 days - Average rainfall days in November:
4.5 days - Average rainfall days in December:
7.2 days
The month with the highest number of rainy days is August (14.8 days).
The month with the least rainy days is November (4.5 days).
Average daylight / Average sunshine
Jefferson, LA
- Average daylight in January:
10h and 30min - Average daylight in February:
11h and 6min - Average daylight in March:
12h and 0min - Average daylight in April:
12h and 54min - Average daylight in May:
13h and 42min - Average daylight in June:
14h and 0min
- Average daylight in July:
13h and 54min - Average daylight in August:
13h and 12min - Average daylight in September:
12h and 18min - Average daylight in October:
11h and 24min - Average daylight in November:
10h and 42min - Average daylight in December:
10h and 18min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in January:
5h and 36min - Average sunshine in February:
5h and 18min - Average sunshine in March:
7h and 54min - Average sunshine in April:
9h and 42min - Average sunshine in May:
10h and 30min - Average sunshine in June:
11h and 0min
- Average sunshine in July:
10h and 36min - Average sunshine in August:
10h and 48min - Average sunshine in September:
10h and 12min - Average sunshine in October:
7h and 12min - Average sunshine in November:
6h and 6min - Average sunshine in December:
5h and 6min
The month with the most sunshine is June (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days
Jefferson, LA
- Average sunshine days in January:
23.9 days - Average sunshine days in February:
19.1 days - Average sunshine days in March:
21.7 days - Average sunshine days in April:
22.1 days - Average sunshine days in May:
19.7 days - Average sunshine days in June:
14.9 days
- Average sunshine days in July:
11.8 days - Average sunshine days in August:
10.3 days - Average sunshine days in September:
14.8 days - Average sunshine days in October:
23.4 days - Average sunshine days in November:
24.6 days - Average sunshine days in December:
21.8 days
The month with the most sunshine days is November (24.6 days).
The month with the least sunshine days is August (10.3 days).
Average UV index
Jefferson, LA
The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover
Jefferson, LA
The month with the most cloud cover is December (Cloud cover 45).
The month with the least cloud cover is October (Cloud cover 24).
Average visibility
Jefferson, LA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
