Climate and monthly weather forecastPortland, MO
Climate and monthly weather forecast
Weather in January
January, the same as December, is an icy winter month in Portland, Missouri, with an average temperature fluctuating between 23°F (-5°C) and 37°F (2.8°C). With average high and low temperatures of 37°F (2.8°C) and 23°F (-5°C) respectively, January is Portland's coldest month. Weather in January »Weather in February
February, the last month of the winter in Portland, is also an icy month, with temperature in the range of an average low of 26.4°F (-3.1°C) and an average high of 41.2°F (5.1°C). Portland registers an average high-temperature of a still wintry 41.2°F (5.1°C) with the arrival of February, showing minor deviation from the preceding month. Weather in February »Weather in March
March, the first month of the spring in Portland, is a fresh month, with an average temperature varying between 36.9°F (2.7°C) and 54°F (12.2°C). With the transition into March, Portland experiences an increase in average high-temperatures, moving up from a cold 41.2°F (5.1°C) in February to a cool 54°F (12.2°C). Weather in March »Weather in April
April is a comfortable spring month in Portland, Missouri, with an average temperature fluctuating between 65.1°F (18.4°C) and 46°F (7.8°C). The shift from March to April sees an increase in the average high-temperature, transitioning from a cool 54°F (12.2°C) to a comfortable 65.1°F (18.4°C). Weather in April »Weather in May
The last month of the spring, May, is a warm month in Portland, Missouri, with an average temperature ranging between max 74.8°F (23.8°C) and min 55.8°F (13.2°C). The start of May brings a rise in the average high-temperature, moving from a comfortable 65.1°F (18.4°C) in April to a moderately hot 74.8°F (23.8°C). Weather in May »Weather in June
The first month of the summer, June, is still a warm month in Portland, Missouri, with an average temperature fluctuating between 65.3°F (18.5°C) and 85.5°F (29.7°C). As Portland transitions into June, the average high-temperature is observed to rise from 74.8°F (23.8°C) in May to a still warm 85.5°F (29.7°C). Weather in June »Weather in July
July in Portland, Missouri, is a hot summer month, with an average temperature varying between 87.4°F (30.8°C) and 67.6°F (19.8°C). July, with average temperatures reaching a high of 87.4°F (30.8°C) and a low of 67.6°F (19.8°C), is the warmest month. July's average heat index is calculated to be a fiery hot 102.2°F (39°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Portland, Missouri, with an average temperature ranging between min 65.7°F (18.7°C) and max 85.6°F (29.8°C). Portland notes an average high-temperature of a moderately hot 85.6°F (29.8°C) in August, displaying minor variation from July. Weather in August »Weather in September
The first month of the autumn, September, is also a moderately hot month in Portland, Missouri, with temperature in the range of an average low of 59°F (15°C) and an average high of 79.3°F (26.3°C). The arrival of September corresponds with a minor reduction in the average high-temperature, down from August's 85.6°F (29.8°C) to a still warm 79.3°F (26.3°C). Weather in September »Weather in October
October, the same as September, is another refreshing autumn month in Portland, Missouri, with an average temperature ranging between max 65.5°F (18.6°C) and min 47.3°F (8.5°C). In the transition to October, Portland observes a drop in the average high-temperature, moving from a moderately hot 79.3°F (26.3°C) in September to an enjoyable 65.5°F (18.6°C). Weather in October »Weather in November
The last month of the autumn, November, is another cool month in Portland, Missouri, with temperature in the range of an average low of 36.7°F (2.6°C) and an average high of 52.9°F (11.6°C). A shift in Portland's weather is observed as October turns into November, with the average high temperature reducing from a comfortable 65.5°F (18.6°C) to a fresh 52.9°F (11.6°C). Weather in November »Weather in December
December, the first month of the winter in Portland, is also an icy month, with temperature in the range of an average low of 28.6°F (-1.9°C) and an average high of 41.5°F (5.3°C). With December's arrival, Portland, Missouri, sees a decrease in average high-temperatures, moving from a fresh 52.9°F (11.6°C) in November to an icy 41.5°F (5.3°C). Weather in December »Updated: Feb 12, 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
January, with its high-temperature average of 37°F (2.8°C) and a low-temperature average of 23°F (-5°C), is the coldest month in Portland.
The month with the least rainfall in Portland is January, when the rain falls for 6 days and typically collects 1.34" (34mm) of precipitation.
In Portland, Missouri, during the entire year, the rain falls for 139.9 days and collects up to 28.19" (716mm) of precipitation.
January through April, October through December are months with snowfall.
In Portland, during the entire year, snow falls for 17.9 days and aggregates up to 8.78" (223mm) of snow.
The months with the least sunshine in Portland, Missouri, are January and February, with an average of 4.6h of sunshine.
The months with the lowest UV index in Portland, Missouri, are January, February, November and December, with an average maximum UV index of 2.
The month with the most snowfall in Portland, Missouri, is February, when snow falls for 5.4 days and typically aggregates up to 2.83" (72mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Portland, 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.
With an average relative humidity of 78%, May is the most humid month in Portland, Missouri.
The month with the most rainfall is May, when the rain falls for 16.4 days and typically aggregates up to 3.58" (91mm) of precipitation.
In Portland, snow does not fall in May through September.
With an average of 14h and 48min of daylight, June has the longest days of the year in Portland, Missouri.
June and July, with an average of 10.4h of sunshine, are months with the most sunshine.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
With average high temperatures of 87.4°F (30.8°C) and lows of 67.6°F (19.8°C), July is the warmest month in Portland, Missouri.
With an average relative humidity of 72%, October is the least humid month in Portland, Missouri.
December has the shortest days of the year in Portland, with an average of 9h and 30min of daylight.
Average temperature
Portland, MO
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (37°F).
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (23°F).
Average pressure
Portland, MO
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Portland, MO
- Average wind speed in January:
9.2mph - Average wind speed in February:
9.1mph - Average wind speed in March:
9mph - Average wind speed in April:
8.9mph - Average wind speed in May:
7.4mph - Average wind speed in June:
6.9mph
- Average wind speed in July:
5.9mph - Average wind speed in August:
6mph - Average wind speed in September:
6.5mph - Average wind speed in October:
8mph - Average wind speed in November:
8.8mph - Average wind speed in December:
8.9mph
The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest month (with the lowest average wind speed) is July (5.9mph).
Average humidity
Portland, MO
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Portland, MO
- Average rainfall in January:
1.34" - Average rainfall in February:
1.5" - Average rainfall in March:
2.36" - Average rainfall in April:
3.23" - Average rainfall in May:
3.58" - Average rainfall in June:
3.23"
- Average rainfall in July:
2.95" - Average rainfall in August:
2.44" - Average rainfall in September:
1.97" - Average rainfall in October:
2.24" - Average rainfall in November:
1.69" - Average rainfall in December:
1.65"
The wettest month (with the highest rainfall) is May (3.58").
The driest month (with the least rainfall) is January (1.34").
Average rainfall days
Portland, MO
- Average rainfall days in January:
6 days - Average rainfall days in February:
7.2 days - Average rainfall days in March:
13.8 days - Average rainfall days in April:
15.2 days - Average rainfall days in May:
16.4 days - Average rainfall days in June:
14.6 days
- Average rainfall days in July:
15.3 days - Average rainfall days in August:
13.3 days - Average rainfall days in September:
11.5 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
9.2 days - Average rainfall days in December:
6.9 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is January (6 days).
Average snowfall
Portland, MO
The month with the highest snowfall is February (2.83").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Portland, MO
- Average snowfall days in January:
5.6 days - Average snowfall days in February:
5.4 days - Average snowfall days in March:
2.3 days - Average snowfall days in April:
0.3 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:
0.1 days - Average snowfall days in November:
0.8 days - Average snowfall days in December:
3.4 days
The month with the highest number of snowfall days is January (5.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Portland, MO
- Average daylight in January:
9h and 48min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 18min - Average daylight in June:
14h and 48min
- Average daylight in July:
14h and 36min - Average daylight in August:
13h and 36min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 6min - Average daylight in December:
9h and 30min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
4h and 36min - Average sunshine in February:
4h and 36min - Average sunshine in March:
6h and 30min - Average sunshine in April:
8h and 24min - Average sunshine in May:
9h and 6min - Average sunshine in June:
10h and 24min
- Average sunshine in July:
10h and 24min - Average sunshine in August:
10h and 6min - Average sunshine in September:
9h and 18min - Average sunshine in October:
5h and 54min - Average sunshine in November:
5h and 24min - Average sunshine in December:
5h and 0min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).
Average sunshine days
Portland, MO
- Average sunshine days in January:
20.5 days - Average sunshine days in February:
15.8 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
13.3 days - Average sunshine days in May:
12.3 days - Average sunshine days in June:
13.1 days
- Average sunshine days in July:
13 days - Average sunshine days in August:
15.9 days - Average sunshine days in September:
16.7 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
19.1 days - Average sunshine days in December:
20.3 days
The month with the most sunshine days is January (20.5 days).
The month with the least sunshine days is May (12.3 days).
Average UV index
Portland, MO
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Portland, MO
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June, July and August (Cloud cover 29).
Average visibility
Portland, MO
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).
