The climate of Greencastle
A geographical position in
Indiana's central region imbues
Greencastle with a humid continental climate, according to the Köppen Climate Classification system. This unique categorization, denoted as Dfa, presents the area with hot summers and no designated dry season.
Throughout the year, Greencastle exhibits a remarkable range of weather conditions, underpinned by monthly variations in various climatological parameters. Notably, the temperature swings from lows of 20.8°F (-6.2°C) in
January to highs of 81.7°F (27.6°C) in
July, outlining the range between chilly winters and warm, lush summers. Humidity averages remain fairly consistent, hovering around 78% to 84% annually, reflecting the consistent moisture content in the atmosphere.
Rainfall, measured in inches, does not adhere to a monotone pattern; instead, it flaunts a periodic rise and decline, with
May experiencing a peak in rainfall. The number of rainfall days also peaks during the spring season, falling between 12.1 days in
June and 15.8 in May. Snowfall is almost absent from
April to
November, punctuated by an uptick from
December to
February, with 1.22" (31mm) of snow noticed in December.
A salient pattern emerges in the realm of daylight hours, which increase steadily from 9.7 hours in January to a peak of 14.9 hours in June, before gradually declining again. This is accompanied by a proportional increase in sunshine hours from 4.2 hours in January to 10.2 hours in June.
The best time to visit Greencastle
Given the climate and weather patterns,
June through
August present as the most desirable time to visit
Greencastle. During these months, visitors can experience the maximum recorded temperatures ranging from 79.7°F (26.5°C) to 81.7°F (27.6°C) and enjoy up to 14.6 to 14.9 daylight hours daily, inviting exploration and outdoor activities. Additionally, sunshine hours peak at 10.2 hours in June, enhancing the allure of this time frame.
The worst time to visit Greencastle
The least favored times to visit
Greencastle fall between
December and
February. During these winter months, the temperatures drop significantly with averages from 33.6°F (0.9°C) to 38.7°F (3.7°C), and daylight hours shrink to a yearly low from 9.4hrs to 9.7hrs. Furthermore, the frequency of snowfall days spike from 5.3 days in December to 5.8 in
January, making travel more challenging and limiting outdoor activities.
Spring weather in Greencastle
Spring in
Greencastle, encompassing
March through
May, exhibits a clear and gradual increase in temperatures. This period sees daytime highs starting from 50.4°F (10.2°C) in March and escalating to 71.8°F (22.1°C) in May. Concurrently, the length of daylight broadens from 12 hours in March to 14.4 hours by May's end, supporting extended outdoor explorations. However, spring also signals higher rainfall levels, peaking in May with an average of 1.5" (38mm) and spanning over 15.8 days.
Summer weather in Greencastle
The heart of summer offers temperatures fluctuating between 71.8°F (22.1°C) in
June and 81.7°F (27.6°C) in
July. While relative humidity holds steady around a comfortable 82% to 84%, the rainfall, though diminished from the spring season, still has its presence with an average of 1.38" (35mm) in June. During summer, daylight extends up to a maximum of 14.9 hours a day, and sunshine hours reach a high of 10.2 in June.
Autumn weather in Greencastle
Autumn, unfolding from
September to
November, witnesses a gradual decline in temperatures, starting from a summer-esque 75.9°F (24.4°C) in September and dropping to a brisk 49.3°F (9.6°C) by November. Daylight hours shorten from 12.4 hours in September to 10 hours in November. However, the frequency of rainfall days and the amount of precipitation moderately decrease, translating to the least rainy season of all, with
October and November seeing 0.67" (17mm) and 0.71" (18mm) respectively.
Winter weather in Greencastle
Winter imposes a cold regime on
Greencastle, from
December to
February, with recorded lowest temperatures swinging between 20.8°F (-6.2°C) in
January and 38.5°F (3.6°C) in February. Daylight hours dwindle to the yearly low of 9.4 hours in December. Furthermore, snowfall dominates, peaking at 1.22" (31mm) in December. Yet, winter also graces the area with lower rainfall. Although the days are short, there is an adequate amount of sunshine piercing through the frosty air.
Greencastle's coldest month, January, generally records average temperatures ranging from a high of 33.6°F (0.9°C) to a low of 20.8°F (-6.2°C). The average relative humidity in January in Greencastle is 81%. In Greencastle, during January, the rain falls for 6.6 days and regularly aggregates up to 0.87" (22mm) of precipitation. In Greencastle, during the entire year, the rain falls for 118.9 days and collects up to 12.13" (308mm) of precipitation. January through
April,
November and December are months with snowfall. In Greencastle,
Indiana, in January, during 5.8 snowfall days, 0.98" (25mm) of snow is typically accumulated. Throughout the year, there are 22.2 snowfall days, and 3.82" (97mm) of snow is accumulated. In January, the average length of the day is 9h and 45min.
On the first day of January in Greencastle, sunrise is at 8:08 am and sunset at 5:33 pm. On the last day of the month, sunrise is at 7:56 am and sunset at 6:05 pm EST. January has the least sunshine of the year, with an average of 4.2h of sunshine. The months with the lowest UV index are January, February,
October through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: In January, the maximum UV index of 2 translates into these guidelines:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Weather in February
With Febuary,
Greencastle residents notice a slight increase in temperature which signals the subsiding winter. The rainfall diminishes slightly from
January, and snow decreases to 0.63" (16mm), encouraging the city to stir from its hibernation.
Weather in February »Weather in March
March comes to
Greencastle with the promise of a warming trend. Alongside the thaw of winter, blooming flora signifies the arrival of Spring, refreshing the city's landscape. However, the emerging pleasant weather also ushers in rainy days as rainfall increases to 0.94" (24mm).
Weather in March »
Weather in April
Spring is in full bloom in
April in
Greencastle. The scenery turns picturesque with bright blossoms standing out against green meadows. While rainfall peaks at 1.42" (36mm), the increase in temperature creates a balanced combination for the city's ecosystem.
Weather in April »Weather in May
As
May swings in, pleasant weather envelops
Greencastle with warmth seeping into the city's spine. Residents pull out summer garbs with temperatures reaching a high of 71.8°F (22.1°C). The month brings in ample daylight and longer sunshine hours, ideal for outdoor activities.
Weather in May »Weather in June
Greencastle warms considerably with
June. The city usually experiences its first summer heatwave during this period. However, the constant
Indiana humidity at 82%, keeps the Fahrenheit in check, providing relief against increasing temperatures.
Weather in June »
Weather in July
July in
Greencastle represents the height of summer. The sultry city highs peak in this month at a substantial 81.7°F (27.6°C). While residents engage in numerous summer activities, the increase in UV index to 6 stresses the necessity for sun protection.
Weather in July » Weather in August
August represents a final burst of summer in
Greencastle. While there is a slight drop in temperature from
July, residents still enjoy warm weather. Rainfall drops to 0.94" (24mm), offering a semi-dry experience to the city denizens.
Weather in August » Weather in September
September ushers in transitional weather in
Greencastle. While warmer days persist, crisper nights hint towards the approach of the autumn season. The arrival of fall results in a reduced daytime temperature, and rainfall decreases to 0.67" (17mm).
Weather in September »
Weather in October
Greencastle's scenery transforms entirely in
October. The tender sunlight beautifully illuminates the city's stunning fall colors, offering a picturesque spectacle. The temperatures continue to dwindle, making room for chilly mornings and evenings.
Weather in October » Weather in November
November brings the first whispers of the forthcoming winter in
Greencastle. The cold edges into the city, and residents brace for frosty mornings framed by breath-taking frosts. Humidity level jumps to 76%, enhancing the chill factor, especially during dawn and dusk.
Weather in November » Weather in December
Winter arrives in full force in
December, dressing
Greencastle in a white winter blanket. The city experiences increased snowfall at 1.22" (31mm) and reintroduces snowflakes drifting through the biting chill. With cloudy skies, the sunlight is often muted, and daylight hours reduce to 9.4.
Weather in December » [Resources]