Climate and monthly weather forecastBrilliant, OH
Climate and monthly weather forecast
The climate of Brilliant
Brilliant, Ohio, USA is situated within the climatic boundaries of the Köppen climate classification Cfa, characterized as a humid subtropical climate with no dry season. This manifests in a consistent pattern of high humidity, with an annual average of around 79% to 85%, and a subtle variation of average pressure values hovering between about 29.95inHg (1014.2mbar) and 30.13inHg (1020.3mbar).Throughout the year, temperatures in Brilliant range from a low of 20.7°F (-6.3°C) in winter to a high of 83.7°F (28.7°C) in the midsummer. With this variation, weather conditions follow an observable pattern - cold winters, pleasant springs, hot summers, and moderate autumns.
Precipitation is distributed fairly evenly throughout the year, with monthly rainfall in Brilliant ranging from 2.17" (55mm) to 3.5" (89mm). Days with rain vary slightly more, from 11.1 to 20.5 each month, indicating the absence of a dry season.
Unfortunately, the clear sky is not a frequent companion in Brilliant. The place's location sees an average of 35% to 68% cloud cover across the year, directly influencing sunshine hours that vary from 2.9 hours in the dark months to 10.1 hours during the brighter days.
The Best Time to Visit Brilliant
The best time to visit Brilliant depends on the visitor's preference for weather conditions. However, statistics point to late spring or early autumn as the most reasonable choices. During these periods, temperatures are typically milder - peaking at around 60.3°F (15.7°C) (in April) to 75.4°F (24.1°C) (in September). Humidity is relatively low compared to the summer season, and the environment generally comfortable for outdoor activities, making these periods an ideal time to experience the charming landscapes of Brilliant.The Worst Time to Visit Brilliant
The summer heat in Brilliant can be quite intense, with temperatures soaring up to 83.7°F (28.7°C) in July. The relative humidity is also highest during the summer, contributing to potentially uncomfortable conditions for many people. Winter sees the place covered in snow and freezing temperatures, posing challenges for travel and outdoor activities. These circumstances point to summer and winter as less appealing times to visit Brilliant.Spring Weather in Brilliant
The spring season in Brilliant, occurring from March to May, offers a transition from the cold of winter to the warmth of summer. Temperatures rise progressively from 47.8°F (8.8°C) in March to 72.3°F (22.4°C) in May. While rainfall increases slowly to a peak of 3.15" (80mm) in May, the number of daylight hours also rises, reaching an average of 14.4 hours in May. It makes spring a delightful time with rejuvenating weather, full of sunny days and fresh greenery.Summer Weather in Brilliant
Summer in Brilliant sees the highest temperatures of the year, moving from 78.8°F (26°C) in June to a peak of 83.7°F (28.7°C) in July before cooling slightly to 81.7°F (27.6°C) in August. The weather is humid, and rain showers fluctuate, with July witnessing the highest rainfall of 3.19" (81mm). Summer days in Brilliant are long and hot, with daylight extending to 15 hours by June. However, despite the high temperatures, the summer season provides ample sunshine, reaching an overwhelming 10 hours of sunshine in July and August.Autumn Weather in Brilliant
Autumn weather in Brilliant, spanning from September to November, offers a retreat from summer's heat. As the season progresses, temperatures start to cool, moving from a comfortable 75.4°F (24.1°C) in September to a rather chilly 49.1°F (9.5°C) by November. Rainfall shows slight fluctuation, ranging from 2.32" (59mm) to 2.56" (65mm), providing a picturesque canvas of red and gold foliage.Winter Weather in Brilliant
Winter in Brilliant brings with it a significant drop in temperatures - from 39.4°F (4.1°C) in December to January's coldest average of 20.7°F (-6.3°C). Notably, the winter season sees the most snowfall, with 5.04" (128mm) in December, tapering to 3.19" (81mm) in February. Winter days are short and often cloudy with low sunshine hours, dropping to 2.9 hours in January. The distinctive winter conditions make Brilliant a scenic winter wonderland, especially for those who enjoy the snowy scenery.Weather in January
January in Brilliant, Ohio, ushers in the new year with its coldest month, as temperatures plunge from 20.7°F (-6.3°C) to a chilling 33.4°F (0.8°C). The month sees most of the city hunkered down bidding their time until the thaw of spring. Weather in January »Weather in February
February brings an end to the harsh cold of January with temperatures slowly starting to climb to a slightly more bearable cold, ranging from 23°F (-5°C) to 37.6°F (3.1°C). Brilliant, Ohio sees a modest reduction in snowfall compared to January. Weather in February »Weather in March
The arrival of spring is heralded by March with temperatures rising still further, oscillating between 31.3°F (-0.4°C) and 47.8°F (8.8°C). Brilliant, Ohio starts transitioning from the biting cold of winter to the promise of warmer days ahead. Weather in March »Weather in April
In April, spring is in full swing in Brilliant, Ohio and the weather warms up significantly, with temperature values ranging from 40.8°F (4.9°C) to 60.3°F (15.7°C). The city registers the highest levels of rainfall for the entire year, measuring 3.5" (89mm). Weather in April »Weather in May
Brilliant, Ohio welcomes May with much cheer as warm weather becomes the norm across the city. Temperatures continue their upward trend, soaring from 50.9°F (10.5°C) to a delightful 72.3°F (22.4°C). The city breathes a sigh of relief as it finally sheds the last vestiges of the cold, entering the full glow of spring. Weather in May »Weather in June
June brings with it the highly anticipated summer season in Brilliant, Ohio. Temperatures continue to rise, playing between 57.7°F (14.3°C) and 78.8°F (26°C). With increased daylight hours, the city basks in the bright sunshine. Weather in June »Weather in July
Summer is at its peak in July with temperatures scaling new heights, ranging from a balmy 61.5°F (16.4°C) to a sizzling 83.7°F (28.7°C). Brilliant, Ohio embraces its hottest month, with residents indulging in an array of sun-soaked festivities. Weather in July »Weather in August
In August, Brilliant, Ohio, begins to witness a slight reprieve from the scorching heat of July. The peak summer temperatures drop a little, ranging from 59.7°F (15.4°C) to 81.7°F (27.6°C). The city cools down a bit but still bathes in the warmth of summer. Weather in August »Weather in September
September welcomes the arrival of autumn in Brilliant, Ohio. Temperatures begin to cool down from the summer highs, oscillating between 55°F (12.8°C) and 75.4°F (24.1°C). The city changes its color palette, with leaves turning into hues of brown, orange, and red. Weather in September »Weather in October
October in Brilliant, Ohio, is a beautiful spectacle with temperatures dropping further to range between 45°F (7.2°C) to 62.1°F (16.7°C). Autumn takes center stage, offering a refreshing contrast from the scorching summer months. Weather in October »Weather in November
November ushers in the onset of winter in Brilliant, Ohio. Temperatures plummet, ranging from 33.6°F (0.9°C) to 49.1°F (9.5°C). The city prepares for the impending cold, with residents bundling up in coats and scarves. Trees stand bare as the last of the autumn leaves have fallen. Weather in November »Weather in December
December in Brilliant, Ohio, is a cold and frosty affair with temperatures dipping sharply between 27.9°F (-2.3°C) to 39.4°F (4.1°C). With the plummeting temperatures, the city decks up for the holiday season. Snowfall becomes a regular feature, blanketing the city in white. Weather in December »Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature
Brilliant, OH
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (33.4°F).
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure
Brilliant, OH
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.97"Hg - Average pressure in May:
29.99"Hg - Average pressure in June:
29.95"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed
Brilliant, OH
- Average wind speed in January:
8mph - Average wind speed in February:
7.7mph - Average wind speed in March:
7.3mph - Average wind speed in April:
7.4mph - Average wind speed in May:
6mph - Average wind speed in June:
5.5mph
- Average wind speed in July:
4.7mph - Average wind speed in August:
4.6mph - Average wind speed in September:
5.1mph - Average wind speed in October:
6.3mph - Average wind speed in November:
6.8mph - Average wind speed in December:
7.3mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity
Brilliant, OH
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall
Brilliant, OH
- Average rainfall in January:
2.4" - Average rainfall in February:
2.6" - Average rainfall in March:
2.68" - Average rainfall in April:
3.5" - Average rainfall in May:
3.15" - Average rainfall in June:
3.07"
- Average rainfall in July:
3.19" - Average rainfall in August:
2.52" - Average rainfall in September:
2.32" - Average rainfall in October:
2.56" - Average rainfall in November:
2.17" - Average rainfall in December:
2.91"
The wettest month (with the highest rainfall) is April (3.5").
The driest month (with the least rainfall) is November (2.17").
Average rainfall days
Brilliant, OH
- Average rainfall days in January:
11.4 days - Average rainfall days in February:
11.4 days - Average rainfall days in March:
15.3 days - Average rainfall days in April:
17.8 days - Average rainfall days in May:
20.5 days - Average rainfall days in June:
17.8 days
- Average rainfall days in July:
19.8 days - Average rainfall days in August:
16.8 days - Average rainfall days in September:
14 days - Average rainfall days in October:
14.1 days - Average rainfall days in November:
11.1 days - Average rainfall days in December:
12.9 days
The month with the highest number of rainy days is May (20.5 days).
The month with the least rainy days is November (11.1 days).
Average snowfall
Brilliant, OH
The month with the highest snowfall is January (5.04").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Brilliant, OH
- Average snowfall days in January:
15.9 days - Average snowfall days in February:
12.1 days - Average snowfall days in March:
7.3 days - Average snowfall days in April:
2.2 days - Average snowfall days in May:
0.1 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:
0.3 days - Average snowfall days in November:
4.1 days - Average snowfall days in December:
11.3 days
The month with the highest number of snowfall days is January (15.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Brilliant, OH
- Average daylight in January:
9h and 42min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 24min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 42min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
2h and 54min - Average sunshine in February:
3h and 48min - Average sunshine in March:
5h and 24min - Average sunshine in April:
7h and 30min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 24min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
10h and 6min - Average sunshine in September:
8h and 18min - Average sunshine in October:
5h and 24min - Average sunshine in November:
5h and 0min - Average sunshine in December:
3h and 30min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days
Brilliant, OH
- Average sunshine days in January:
8.5 days - Average sunshine days in February:
9.2 days - Average sunshine days in March:
10.4 days - Average sunshine days in April:
10.3 days - Average sunshine days in May:
8.6 days - Average sunshine days in June:
10.2 days
- Average sunshine days in July:
9.6 days - Average sunshine days in August:
12.5 days - Average sunshine days in September:
13.7 days - Average sunshine days in October:
14.5 days - Average sunshine days in November:
16.3 days - Average sunshine days in December:
10.9 days
The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is January (8.5 days).
Average UV index
Brilliant, OH
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Brilliant, OH
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility
Brilliant, OH
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January and February (4mi).





