2025 Compare Climate & Weather:
Portsmouth, VA vs Slidell, LA

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Highlights

On average, there are 222 sunny days per year in Slidell. Portsmouth averages 217 sunny days per year. The US average is 205 sunny days.

Slidell, Louisiana gets 61.7 inches of rain, on average, per year. Portsmouth, Virginia gets 47.4 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Slidell averages 0.1 inches of snow per year. Portsmouth averages 5 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Slidell, Louisiana
Summer High:
the July high is around 90.8 degrees
Winter Low: the January low is 40.2
Rain: averages 61.7 inches of rain a year
Snow: averages 0.1 inches of snow a year

Portsmouth, Virginia
Summer High:
the July high is around 88.3 degrees
Winter Low: the January low is 33.4
Rain: averages 47.4 inches of rain a year
Snow: averages 5 inches of snow a year

BestPlaces Comfort Index
Slidell

The annual BestPlaces Comfort Index for Slidell is 6.9 (10=best), which means it is more comfortable than most places in Louisiana.

6.9 / 10
October, April and November are the most pleasant months in Slidell, while July and August are the least comfortable months.

Portsmouth

The annual BestPlaces Comfort Index for Portsmouth is 7.4 (10=best), which means it is more comfortable than most places in Virginia.

7.4 / 10
May, October and September are the most pleasant months in Portsmouth, while July and January are the least comfortable months.

Today's Weather - Portsmouth, VA

9 AM PST

Mostly Cloudy

75°F

DAYDESCRIPTIONHIGH / LOWWIND
This AfternoonMostly Cloudy80° / 64°SW 6 mph
MondayChance Rain Showers75° / 67°SE 7 to 13 mph
TuesdayRain Showers71° / 67°SE 12 to 15 mph
WednesdayShowers And Thunderstorms Likely77° / 66°SE 6 to 9 mph
ThursdayChance Showers And Thunderstorms78° / 69°S 3 to 7 mph
FridayMostly Sunny then Slight Chance Rain Showers85° / 72°SW 3 to 9 mph
SaturdayChance Showers And Thunderstorms85° / 69°W 6 to 9 mph
Today's Weather - Slidell, LA

9 AM PST

Mostly Sunny then Slight Chance Showers And Thunderstorms

71°F

DAYDESCRIPTIONHIGH / LOWWIND
TodayMostly Sunny then Slight Chance Showers And Thunderstorms79° / 61°SW 5 mph
MondayChance Rain Showers79° / 63°W 0 to 10 mph
TuesdaySunny86° / 68°SW 0 to 10 mph
WednesdaySunny88° / 70°SW 5 to 10 mph
ThursdayMostly Sunny92° / 72°SW 5 to 10 mph
FridayMostly Sunny93° / 71°S 0 to 10 mph
SaturdayMostly Sunny92° / 71°SW 0 to 5 mph
Average Monthly High / Low (°F)
MonthPortsmouth, VASlidell, LA
January49° / 33°61° / 40°
February52° / 35°64° / 43°
March59° / 41°71° / 49°
April69° / 50°77° / 56°
May77° / 59°84° / 64°
June84° / 68°89° / 71°
July88° / 72°91° / 73°
August86° / 71°91° / 73°
September80° / 65°87° / 68°
October71° / 54°80° / 57°
November62° / 45°71° / 49°
December53° / 37°63° / 42°
Hot, Freezing, Rainy, Snowy Days: Portsmouth / Slidell
MonthHot DaysFreezing DaysRainy DaysSnowy Days
January0 / 014 / 810 / 101 / 0
February0 / 010 / 410 / 91 / 0
March0 / 04 / 110 / 80 / 0
April0 / 00 / 010 / 70 / 0
May1 / 30 / 011 / 70 / 0
June7 / 130 / 010 / 110 / 0
July12 / 200 / 011 / 130 / 0
August8 / 190 / 010 / 130 / 0
September2 / 90 / 08 / 90 / 0
October0 / 10 / 07 / 70 / 0
November0 / 02 / 19 / 80 / 0
December0 / 010 / 610 / 90 / 0
July is the hottest month for Portsmouth with an average high temperature of 88.3°, which ranks it as warmer than most places in Virginia. In Portsmouth, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Portsmouth are May, September and June.

July is the hottest month for Slidell with an average high temperature of 90.8°, which ranks it as one of the coolest places in Louisiana. In Slidell, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Slidell are April, October and May.
January has the coldest nighttime temperatures for Portsmouth with an average of 33.4°. This is one of the warmest places in Virginia.

January has the coldest nighttime temperatures for Slidell with an average of 40.2°. This is warmer than most places in Louisiana.

In Portsmouth, there are 30.1 days annually when the high temperature is over 90°, which is hotter than most places in Virginia.

In Slidell, there are 63.6 days annually when the high temperature is over 90°, which is one of the coolest places in Louisiana.

In Portsmouth, there are 38.8 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Virginia.

In Slidell, there are 20.2 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Louisiana.

In Portsmouth, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Virginia.

In Slidell, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Louisiana.

August is the wettest month in Portsmouth with 5.9 inches of rain, and the driest month is February with 3.1 inches. The wettest season is Autumn with 32% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 47.4 inches in Portsmouth means that it is one of the wettest places in Virginia.


August is the wettest month in Slidell with 7.0 inches of rain, and the driest month is October with 3.6 inches. The wettest season is Autumn with 31% of yearly precipitation and 19% occurs in Winter, which is the driest season. The annual rainfall of 61.7 inches in Slidell means that it is wetter than most places in Louisiana.

July is the rainiest month in Portsmouth with 11.0 days of rain, and October is the driest month with only 7.4 rainy days. There are 115.2 rainy days annually in Portsmouth, which is about average compared to other places in Virginia. The rainiest season is Summer when it rains 27% of the time and the driest is Winter with only a 21% chance of a rainy day.

July is the rainiest month in Slidell with 13.0 days of rain, and April is the driest month with only 6.7 rainy days. There are 109.2 rainy days annually in Slidell, which is rainier than most places in Louisiana. The rainiest season is Autumn when it rains 34% of the time and the driest is Summer with only a 20% chance of a rainy day.

An annual snowfall of 5.0 inches in Portsmouth means that it is one of the least snowy places in Virginia.

An annual snowfall of 0.1 inches in Slidell means that it is snowier than most places in Louisiana.
February is the snowiest month in Portsmouth with 2.1 inches of snow, and 3 months of the year have significant snowfall.

December is the snowiest month in Slidell with 0.0 inches of snow, and no months of the year have significant snowfall.

DID YOU KNOW?

Many people confuse Weather and Climate, but they are different. Weather refers to the conditions of the atmosphere over a short period of time, while Climate refers to the conditions of the atmosphere over a long period of time.

Weather, more specifically, refers to how the atmosphere behaves and its effects on life and human activities. Most people think of Weather in terms of what can be observed: temperature, humidity, precipitation, and cloudy/sunny conditions. Weather conditions constantly change on a minute-to-minute basis.

Climate is a record of the average weather conditions for a given place over a long period of time, often referred to as Climate Normals. A 30-year period of record is a common requirement to be considered a Climate Normal.

Reviews for Portsmouth    2 Reviews

Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't  More

   |    Reply

Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but  More

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Start Your Review of Portsmouth

Reviews for Slidell    2 Reviews

Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't  More

   |    Reply

Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but  More

   |    Reply

Start Your Review of Slidell

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Zips In Portsmouth, Virginia
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Zips In SLIDELL, LOUISIANA
70458, 70461, 70460
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