Climate and monthly weather forecastJohn Day, OR
Climate and monthly weather forecast
The climate of John Day
Situated in Oregon, USA, John Day is subject to a Dsb Köppen climate classification, referred to as a Humid continental climate with a dry warm summer. This climate pattern is known for variations in temperature and precipitation throughout the year.Throughout the seasons, temperature indices fluctuate significantly in John Day. High temperatures range from 33.4°F (0.8°C) in December up to 81.7°F (27.6°C) in the peak of July, showcasing a considerable shift from cool to warm. Low-temperature readings also reflect this trend, with the coldest month, December, averaging a low of 19.6°F (-6.9°C), while July reaches up to 48.4°F (9.1°C).
Apart from temperature, other weather elements hold significance. Relative humidity percentages oscillate from 42% during the hottest period to 85% in February, indicating a moderate to high level of moisture in the atmosphere. The town sees the highest rainfall in December with about 2.24" (57mm) spread across an average of 11.1 days, while the driest month July, registers a mere 0.24" (6mm) over approximately 3.8 days.
Though snowfall is not a constant feature all year, it becomes a key part of the wintery weather conditions between December to February, with snowfall measures hitting a high of 10.31" (262mm) in February. On the contrary, highest wind speeds are seen in March and November registering 6.1mph (9.8km/h) and 6mph (9.7km/h) respectively with gusts reaching up to 10.5mph (16.9km/h) in November.
The best time to visit John Day
Considering the temperature and weather patterns, the optimal time to visit John Day would be from late spring to early autumn, particularly between May to September. During this time, high temperatures average between 61.3°F (16.3°C) to 81°F (27.2°C), providing a comfortable climate for outdoor activities. The lower rainfall, particularly in July at 0.24" (6mm), contributes to fewer interruptions to outdoor plans.The UV index is relatively moderate, primarily revolving around 5 in June and dropping to 3 by September. Nonetheless, visitors should still take precautions to protect against sun damage during the peak sunshine hours.
The worst time to visit John Day
Winter months, specifically between December to February, may not be the most suitable for travel due to harsh weather conditions. The average low temperatures during these months fall between 19.6°F (-6.9°C) to 22.5°F (-5.3°C), providing a chilly environment that may not be welcoming to all. Snowfall measurements spike to 8.11" (206mm) in December and 10.31" (262mm) in February, which may lead to disruptions in traffic and outdoor activities.Spring weather in John Day
Spring in John Day sees warmer weather emerging as temperatures rise steadily from March to May. Highs range from 50.4°F (10.2°C) to 61.3°F (16.3°C) and lows rise from 29.3°F (-1.5°C) to 36.1°F (2.3°C). The duration of daylight increases significantly during this season, offering up to 14.8 hours of daylight in May. While there is lesser rainfall in comparison to winter months, the area still experiences measurable precipitation with about 1.65" (42mm) noted in May.Summer weather in John Day
Summer is defined by dry, warm conditions in John Day. Beginning in June, temperatures continue to climb reaching a high of 81.7°F (27.6°C) in July and returning to 71.2°F (21.8°C) by the end of August. Rainfall measures minimally at 0.24" (6mm) to 0.28" (7mm) from June to August, indicating predominantly dry conditions.Autumn weather in John Day
Autumn introduces cooler weather as temperatures start to decline from 71.2°F (21.8°C) in September to 43°F (6.1°C) by November. Rainfall becomes more consistent, with values of 1.42" (36mm) noticed in November. Around this time, there is also a gradual decrease in daylight hours, reducing to about 9.6 hours per day by November.Winter weather in John Day
Winter in John Day is characterized by lower temperatures and significant snowfall. The coldest months, December and January, record average high temperatures of 33.4°F (0.8°C) and 35.2°F (1.8°C), and lows between 19.6°F (-6.9°C) to 22.1°F (-5.5°C). Snowfall peaks in February, with accumulations measuring about 10.31" (262mm). Total daylight time during winter is relatively shorter compared to other seasons, making the days feel shorter.Weather in January
January in John Day, Oregon experiences the frigid bite of winter. A common characteristic during this period is the relative humidity of 84%, paired with high chances of snowfall, totaling to 8.11" (206mm). It is noticeably colder than the following month, making it a perfect time for winter sports. Weather in January »Weather in February
February sees a slight increase in average temperatures compared to the preceding month. When it comes to snowfall, an increase is observed, with 10.31" (262mm) of snow decorating the city. Consequently, drivers are recommended to exercise caution while navigating snowy roads. Weather in February »Weather in March
There is a notable shift in weather patterns in March, marking the transition from winter to spring. The month stands out because of its snowfall which lessens to 5.83" (148mm), indicating a retreat of winter. The pressure tends to be stable during this period, contributing to more predictable weather. Weather in March »Weather in April
April conveys the full bloom of spring, with a considerable increase in temperatures from March. The distinct feature about this month is the drastic reduction in snowfall to 1.69" (43mm), a clear indication of winter's end. The city becomes livelier, with nature reclaiming its vivid colors lost during the winter. Weather in April »Weather in May
May carries the warmth of spring into John Day, Oregon, promising pleasant weather conditions. Rainfall measures 1.65" (42mm), making it relatively drier compared to the preceding months. With the rise in temperature, outdoor activities become more popular among residents and tourists. Weather in May »Weather in June
June introduces the engaging summer season in John Day, Oregon. The most distinguished characteristics are the average low temperature of 41.2°F (5.1°C) and the reduced rainfall, accounting for just 0.94" (24mm). These conditions create a welcoming platform for camping and hiking. Weather in June »Weather in July
July sits at the peak of summer with record high temperatures not seen in previous months. The unique weather pattern is represented by the least amount of rainfall at 0.24" (6mm). The heat encourages residents to bask in local swimming spots. Weather in July »Weather in August
August oversees a continuation of the dominant summer conditions but maintains almost the exact same temperature range as July. What sets this month apart is the slight increase in rainfall to 0.28" (7mm), a signal of the approaching end of summer. Weather in August »Weather in September
With the commencement of September, the weather starts to transition into fall. Although the temperature drop is nominal, the observable difference is the increase in rainfall to 0.55" (14mm). The presence of early fall foliage starts to draw leaf-peepers. Weather in September »Weather in October
October brings more noticeable indicators of fall, with temperatures dipping further. The clear sign of transition is the greater amount of rainfall, measuring up to 1.3" (33mm). This also marks the beginning of the rainy season in John Day, Oregon. Weather in October »Weather in November
In November, the weather starts getting colder, marking the beginnings of winter. The significant change this month is the revival of snowfall, measuring 4.02" (102mm). The landscape of John Day, Oregon gradually white-washes, making it a serene sight to behold. Weather in November »Weather in December
December in John Day, Oregon is characterized by a full-fledged winter. The weather element that makes this month exceptional is the most pronounced quantity of snowfall at 8.31" (211mm). The weather remains cold, often with freezing mornings and nights. Weather in December »Updated: Jul 26, 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
Throughout the year, there are 127.7 rainfall days, and 17.09" (434mm) of precipitation is accumulated.
Months with snowfall are January through May, September through December.
Throughout the year, there are 62.5 snowfall days, and 39.17" (995mm) of snow is accumulated.
January and February, with an average of 5.2h of sunshine, are months with the least sunshine in John Day.
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index.
With an average relative humidity of 85%, February is the most humid month.
February is the month with the most rainfall. Rain falls for 11.9 days and accumulates 2.28" (58mm) of precipitation.
The month with the most snowfall is February, when snow falls for 12.5 days and typically aggregates up to 10.31" (262mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
In John Day, Oregon, snow does not fall in June through August.
The month with the longest days in John Day is June, with an average of 15h and 30min of daylight.
John Day's warmest month, July, registers temperatures that range from a high of 81.7°F (27.6°C) to a low of 48.4°F (9.1°C).
July is the month with the least rainfall. Rain falls for 3.8 days and accumulates 0.24" (6mm) of precipitation.
With an average maximum UV index of 6, July is the month with the highest UV index.
The least humid month in John Day is August, with an average relative humidity of 42%.
With an average of 12.1h of sunshine, August has the most sunshine of the year.
December, with average temperatures reaching a high of 33.4°F (0.8°C) and a low of 19.6°F (-6.9°C), is the coldest month.
December has the shortest days of the year in John Day, with an average of 8h and 54min of daylight.
Average temperature
John Day, OR
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (33.4°F).
The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is December (19.6°F).
Average pressure
John Day, OR
- Average pressure in January:
30.22"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
30.01"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.93"Hg - Average pressure in September:
29.97"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.19"Hg
The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).
Average wind speed
John Day, OR
- Average wind speed in January:
6mph - Average wind speed in February:
5.7mph - Average wind speed in March:
6.1mph - Average wind speed in April:
6.2mph - Average wind speed in May:
5.7mph - Average wind speed in June:
5.6mph
The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest months (with the lowest average wind speed) are August and September (5mph).
Average humidity
John Day, OR
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is August (42%).
Average rainfall
John Day, OR
- Average rainfall in January:
2.17" - Average rainfall in February:
2.28" - Average rainfall in March:
2.17" - Average rainfall in April:
1.85" - Average rainfall in May:
1.65" - Average rainfall in June:
0.94"
- Average rainfall in July:
0.24" - Average rainfall in August:
0.28" - Average rainfall in September:
0.55" - Average rainfall in October:
1.3" - Average rainfall in November:
1.42" - Average rainfall in December:
2.24"
The wettest month (with the highest rainfall) is February (2.28").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days
John Day, OR
- Average rainfall days in January:
12.3 days - Average rainfall days in February:
11.9 days - Average rainfall days in March:
17.3 days - Average rainfall days in April:
14.9 days - Average rainfall days in May:
14.8 days - Average rainfall days in June:
8.9 days
- Average rainfall days in July:
3.8 days - Average rainfall days in August:
3.3 days - Average rainfall days in September:
6.6 days - Average rainfall days in October:
11.5 days - Average rainfall days in November:
11.3 days - Average rainfall days in December:
11.1 days
The month with the highest number of rainy days is March (17.3 days).
The month with the least rainy days is August (3.3 days).
Average snowfall
John Day, OR
- Average snowfall in January:
8.11" - Average snowfall in February:
10.31" - Average snowfall in March:
5.83" - Average snowfall in April:
1.69" - Average snowfall in May:
0.28" - Average snowfall in June:
0"
The month with the highest snowfall is February (10.31").
The months with the least snowfall are June, July and August (0").
Average snowfall days
John Day, OR
- Average snowfall days in January:
11.7 days - Average snowfall days in February:
12.5 days - Average snowfall days in March:
9.6 days - Average snowfall days in April:
4.6 days - Average snowfall days in May:
1.3 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:
0.2 days - Average snowfall days in October:
1.3 days - Average snowfall days in November:
6.8 days - Average snowfall days in December:
14.5 days
The month with the highest number of snowfall days is December (14.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
John Day, OR
- Average daylight in January:
9h and 18min - Average daylight in February:
10h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 30min - Average daylight in May:
14h and 48min - Average daylight in June:
15h and 30min
- Average daylight in July:
15h and 6min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 36min - Average daylight in December:
8h and 54min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in January:
5h and 12min - Average sunshine in February:
5h and 12min - Average sunshine in March:
7h and 24min - Average sunshine in April:
10h and 12min - Average sunshine in May:
10h and 48min - Average sunshine in June:
11h and 24min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
12h and 6min - Average sunshine in September:
10h and 42min - Average sunshine in October:
7h and 6min - Average sunshine in November:
6h and 12min - Average sunshine in December:
5h and 18min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The months with the least sunshine are January and February (Average sunshine: 5h and 12min).
Average sunshine days
John Day, OR
- Average sunshine days in January:
13.5 days - Average sunshine days in February:
9 days - Average sunshine days in March:
9.2 days - Average sunshine days in April:
11.8 days - Average sunshine days in May:
13.8 days - Average sunshine days in June:
18.9 days
- Average sunshine days in July:
24.9 days - Average sunshine days in August:
24.8 days - Average sunshine days in September:
21.8 days - Average sunshine days in October:
18.1 days - Average sunshine days in November:
14.5 days - Average sunshine days in December:
11.4 days
The month with the most sunshine days is July (24.9 days).
The month with the least sunshine days is February (9 days).
Average UV index
John Day, OR
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover
John Day, OR
The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility
John Day, OR
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
