Climate and monthly weather forecastOskaloosa, IA
Climate and monthly weather forecast
The climate of Oskaloosa
The city of Oskaloosa, Iowa, USA experiences a Humid continental, Dfa Köppen climate. This type of climate is characterized by no distinct dry season and hot summers. Oskaloosa's geographical position plays a significant role in its varied weather conditions, with temperature fluctuations being a constant factor. The average high temperature ranges from 28.6°F (-1.9°C) in January to 82.2°F (27.9°C) in July. The lowest average temperatures span from 15.3°F (-9.3°C) in January to 64.9°F (18.3°C) in July.Significant precipitation is a classic characteristic of Oskaloosa's weather, peaking at 4.37" (111mm) in May, with July experiencing the least amount of rainfall at 2.6" (66mm). This city witnesses rainfall throughout the majority of the year, with an average of 10.8 rainy days in March to 5.3 days in January. Notably, snowfall is a regular occurrence from December to March, reaching up to 4.92" (125mm) in February.
The climate of Oskaloosa also exhibits differences in daylight hours throughout the year. The longest days are in June, with an average of 15.1 hours of daylight, while December has the shortest days averaging 9.3 hours. Meanwhile, the sunshine hours show a peak in July at 10.3 hours and are the least during November and December, with an average duration of 5.6 hours. These variations emphasize the diversity and richness of the weather in Oskaloosa, making it a place of distinct seasons.
The Best Time to Visit Oskaloosa
The best time to visit Oskaloosa depends largely on preferences for particular weather conditions. However, for those seeking mild temperatures and moderate rainfall, the time frame between May and June is optimal. During these months, the average high temperatures are comfortably between 70°F (21.1°C) and 79.3°F (26.3°C). Additionally, there's ample sunshine with up to 8.8 and 9.9 hours of sunlight per day, respectively. In terms of rainfall, May experiences 4.37" (111mm) over 18.3 precipitation days, while June has 4.17" (106mm) spread over 18.6 days.The Worst Time to Visit Oskaloosa
The time period between December and February might not be the most pleasant for tourists. During these months, Oskaloosa grapples with lower temperatures that drop to 15.3°F (-9.3°C) in January. Additionally, snowfall is common during these months, with February experiencing up to 4.92" (125mm) of snow. Not to mention, the daylight hours are shortest during this period with December only getting an average of 9.3 hours a day.Spring Weather in Oskaloosa
Spring in Oskaloosa witnesses a distinct transition from the cold winter season to warmer conditions. From March to May, the average high temperatures increase from 47.5°F (8.6°C) to 70°F (21.1°C) while the lowest temperatures range from 32.5°F (0.3°C) to 53.1°F (11.7°C) across the same period. The spring months are also characterized by rising amounts of rainfall, culminating in May with a high of 4.37" (111mm) over approximately 18.3 days.Summer Weather in Oskaloosa
Summers in Oskaloosa are typically hot and humid, with temperatures reaching an average peak of 82.2°F (27.9°C) in July, and not going below 63°F (17.2°C) even at night. Alongside this heat, rainfall is noticeably present during this season, particularly in June, registering up to 4.17" (106mm). The period from June to August also offers the longest daylight hours, with June enjoying 15.1 hours on average.Autumn Weather in Oskaloosa
During the fall season, from September to November, Oskaloosa undergoes a gradual cooling down process from the highs of summer. Temperatures dwindle gradually from an average high of 75.9°F (24.4°C) in September to 47.3°F (8.5°C) in November. The corresponding average low temperatures also drop from 56.1°F (13.4°C) to 33.1°F (0.6°C) across the same time frame. Rainfall lessens steadily through the period, from 2.87" (73mm) in September to 1.46" (37mm) by November, while the number of days with precipitation decreases as well from 12.2 days to 7.6 days.Winter Weather in Oskaloosa
Cold is the predominant weather pattern in Oskaloosa during winter, with the lowest average temperatures hitting 15.3°F (-9.3°C) in January. Snowfall is regular from December through February, with February seeing the maximum amount at 4.92" (125mm). On average, the daylight lasts only 9.3 hours in December, making it the month with the least amount of sunlight in the year. High relative humidity levels also frequent the winter months, peaking at 82% in December and January.Weather in January
In Oskaloosa, Iowa, the year starts with January registering lower temperatures, setting the stage for cold weather. The city experiences chilly winds with an average of 10.6mph (17.1km/h). The coldest period of the year, it witnesses the lowest average temperature of 15.3°F (-9.3°C). Weather in January »Weather in February
A continuation of winter, February brings a slight increase in temperatures in Oskaloosa. With average high temperatures rising to 32.5°F (0.3°C), there is still significant snowfall at 4.92" (125mm). The city continues to experience a cool climate, making it ideal for those who enjoy seasonal changes. Weather in February »Weather in March
As winter transitions into spring, March brings about a considerable increase in temperature. Warmer days start appearing, and snowfall drastically decreases to 2.01" (51mm). This shift in weather conditions helps to bring the surroundings back to life after the winter. Weather in March »Weather in April
Offering a more spring-like atmosphere, April comes with an increased average high temperature of 59.5°F (15.3°C). Oskaloosa experiences the highest rainfall of the year in April at 2.91" (74mm), indicating a shift towards wetter months. Weather in April »Weather in May
May ushers in warmer months in Oskaloosa, with temperatures continuing to rise. May also has the highest relative humidity of the year at 80%. With temperatures becoming pleasingly mild, it is a great time to explore the area's outdoor attractions. Weather in May »Weather in June
June in Oskaloosa introduces the summer season with increased temperatures. The weather remains mild and clear, allowing for more options to enjoy outdoor activities. It has the maximum daylight hours in a year, signalling the arrival of long, sunny days. Weather in June »Weather in July
As summer swings into full force, July reports the highest temperatures with a record high of 82.2°F (27.9°C) in Oskaloosa. With a steady pattern of warmth and higher UV levels, caution is advised when going outdoors. Coinciding with summer holidays, July is a popular month for vacationing and exploring despite the high temperatures. Weather in July »Weather in August
August in Oskaloosa continues to experience high temperatures, making it one of the hottest months of the year. However, it’s somewhat cooler than July, providing a slight relief to the residents. Notably, this month experiences a decrease in wind speed, resulting in calm, hot days. Weather in August »Weather in September
September in Oskaloosa marks the beginning of fall, characterized by pleasing weather. The temperatures start to decrease, providing more comfortable weather conditions. With falling temperatures, September boasts perfect conditions to enjoy outdoor activities and festivities. Weather in September »Weather in October
The year's feel of autumn becomes more pronounced in Oskaloosa during October, with temperatures further dropping. October stands as one of the windier months with 9.5mph (15.3km/h) average wind speed. The weather at this time is characterized by cool temperatures and low humidity levels. Weather in October »Weather in November
November in Oskaloosa witnesses a drastic drop in temperatures, indicating the upcoming winter season's arrival. November also experiences a rise in wind speed, up to an average of 10.3mph (16.6km/h). Furthermore, the decrease in daylight hours gives a hint of colder, shorter days in the coming months. Weather in November »Weather in December
Cold and chilly weather characterizes December in Oskaloosa, wrapping up the year in a wintry vibe. The temperature drops further, and snowfall returns with an average of 1.65" (42mm). As daylight hours decrease, nights become longer, and the city is often blanketed in snow. 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
Oskaloosa's coldest weather arrives in January, when temperatures average a high of 28.6°F (-1.9°C) and a low of 15.3°F (-9.3°C).
January is the month with the least rainfall. Rain falls for 5.3 days and accumulates 1.06" (27mm) of precipitation.
Throughout the year, there are 141.1 rainfall days, and 28.5" (724mm) of precipitation is accumulated.
January through May, October through December are months with snowfall in Oskaloosa, Iowa.
Throughout the year, there are 32.1 snowfall days, and 15.28" (388mm) of snow is accumulated.
January has the least sunshine of the year in Oskaloosa, Iowa, with an average of 4.2h of sunshine.
With an average maximum UV index of 1, January is the month with the lowest UV index.
The month with the most snowfall is February, when snow falls for 8.4 days and typically aggregates up to 4.92" (125mm) of snow.
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.
May is the month with the most rainfall in Oskaloosa. Rain falls for 18.3 days and accumulates 4.37" (111mm) of precipitation.
With an average relative humidity of 83%, June is the most humid month in Oskaloosa.
In Oskaloosa, Iowa, snow does not fall in June through September.
June has the longest days of the year in Oskaloosa, Iowa, with an average of 15h and 6min of daylight.
June and July, with an average maximum UV index of 6, are months with the highest UV index in Oskaloosa, Iowa.
July, with its average high-temperature of 82.2°F (27.9°C) and an average low-temperature of 64.9°F (18.3°C), holds the record as the warmest month in Oskaloosa, Iowa.
July has the most sunshine of the year in Oskaloosa, Iowa, with an average of 10.3h of sunshine.
With an average relative humidity of 72%, October is the least humid month.
With an average of 9h and 18min of daylight, December has the shortest days of the year in Oskaloosa.
Average temperature
Oskaloosa, IA
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (28.6°F).
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure
Oskaloosa, IA
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.13"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.89"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed
Oskaloosa, IA
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.5mph - Average wind speed in May:
8.9mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
6.9mph - Average wind speed in August:
6.9mph - Average wind speed in September:
7.9mph - Average wind speed in October:
9.5mph - Average wind speed in November:
10.3mph - Average wind speed in December:
10mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.9mph).
Average humidity
Oskaloosa, IA
The month with the highest relative humidity is June (83%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Oskaloosa, IA
- Average rainfall in January:
1.06" - Average rainfall in February:
1.22" - Average rainfall in March:
2.01" - Average rainfall in April:
2.91" - Average rainfall in May:
4.37" - Average rainfall in June:
4.17"
The wettest month (with the highest rainfall) is May (4.37").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days
Oskaloosa, IA
- Average rainfall days in January:
5.3 days - Average rainfall days in February:
5.1 days - Average rainfall days in March:
10.8 days - Average rainfall days in April:
14.5 days - Average rainfall days in May:
18.3 days - Average rainfall days in June:
18.6 days
- Average rainfall days in July:
17.1 days - Average rainfall days in August:
14.2 days - Average rainfall days in September:
12.2 days - Average rainfall days in October:
10.3 days - Average rainfall days in November:
7.6 days - Average rainfall days in December:
7.1 days
The month with the highest number of rainy days is June (18.6 days).
The month with the least rainy days is February (5.1 days).
Average snowfall
Oskaloosa, IA
- Average snowfall in January:
4.13" - Average snowfall in February:
4.92" - Average snowfall in March:
2.01" - Average snowfall in April:
0.87" - Average snowfall in May:
0.12" - Average snowfall in June:
0"
The month with the highest snowfall is February (4.92").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Oskaloosa, IA
- Average snowfall days in January:
8.8 days - Average snowfall days in February:
8.4 days - Average snowfall days in March:
4.5 days - Average snowfall days in April:
1.1 days - Average snowfall days in May:
0.2 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:
0.4 days - Average snowfall days in November:
2.2 days - Average snowfall days in December:
6.5 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Oskaloosa, IA
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 18min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
4h and 12min - Average sunshine in February:
4h and 30min - Average sunshine in March:
6h and 24min - Average sunshine in April:
8h and 6min - Average sunshine in May:
8h and 48min - Average sunshine in June:
9h and 54min
- Average sunshine in July:
10h and 18min - Average sunshine in August:
9h and 54min - Average sunshine in September:
9h and 24min - Average sunshine in October:
5h and 42min - Average sunshine in November:
5h and 36min - Average sunshine in December:
4h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days
Oskaloosa, IA
- Average sunshine days in January:
18.1 days - Average sunshine days in February:
15.8 days - Average sunshine days in March:
16.3 days - Average sunshine days in April:
13.3 days - Average sunshine days in May:
9.8 days - Average sunshine days in June:
9 days
- Average sunshine days in July:
11 days - Average sunshine days in August:
14.4 days - Average sunshine days in September:
15.6 days - Average sunshine days in October:
19 days - Average sunshine days in November:
19.4 days - Average sunshine days in December:
18.5 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is June (9 days).
Average UV index
Oskaloosa, IA
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Oskaloosa, IA
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are August and September (Cloud cover 29).
Average visibility
Oskaloosa, IA
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).
