An early frost can lead to brittleness for already thirsty leaves and impact how long those leaves can hang on branches before gravity pulls them to the ground. But if it gets too cold, too fast, leaf-viewing time will be crimped. In the weeks before their transformation, trees prefer warmish, sunny days and crisp, cool nights to bring on the most vibrant color transformation.įor sure, a mild fall that brings some cooling relief will be embraced by much of the country’s trees and its people. Open semifinal eventually won by Coco GauffĮlsewhere, parts of Nevada, Colorado and New Mexico tied their all-time temperature highs this summer, while portions of Arizona marked their highest-ever night-time temperatures. Northeast, too, including in recent days and nights during the U.S. There were a couple of extreme-heat spells in the U.S. That translated to a record string of days above 90 degrees F for Phoenix, and hot and humid conditions above 100 degrees F over an uncomfortable run of days in areas of Texas. Blame global warming and El Niño.įor the globe, August averaged about 1.5 degrees Celsius (2.7 degrees Fahrenheit) warmer than pre-industrial averages. Read: It’s official: This summer was the hottest on recordĪnd: July 2023 is the hottest month ever recorded. A recent report issued by the U.N.’s World Meteorological Organization declared summer 2023 the hottest on record as persistent global warming from burning fossil fuels like coal and oilĪlong with the shorter-term heat impact from an early showing of an El Niño, drove the thermometer higher from Texas to New York to Spain to China. In fact, the heat this summer for many parts of the country rewrote the record books.
5, government data shows, with 36% of the lower 48 states considered to be in drought, according to the U.S. Nationwide drought conditions rose for the 8th straight week as of Sept. as kids returned to school in recent weeks.ĭrought conditions worsened in the Northwest, Plains, Midwest and from eastern Arizona across to Louisiana and Mississippi. Heat and dryness dominated large parts of the U.S. Late summer conditions aren’t exactly playing fair. On the contrary, drought and intense, long-lasting heat can lead to dull colors, as the conditions put trees under more stress and likely cause them to shed their leaves early, before the normal process of gradually losing chlorophyll has a chance to accelerate before leaves release from tree branches. Wet weather from late spring through the middle of summer is the first step toward securing a brilliant offering of fall foliage, said Paul Pastelok, AccuWeather’s senior meteorologist. How do spring and summer weather impact fall color change? Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.For sure, fall excursions to view the color changes should be pushed ahead to the earliest weeks of autumn in key regions known for their showy fall displays, says AccuWeather. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. It's recommended to limit sun exposure when its radiation is at its peak during midday. Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Note: In October, the maximum UV index of 2 transforms into these recommendations: A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
UV indexIn Colville, the average daily maximum UV index in October is 2. Sunshine In Colville, the average sunshine in October is 6.4h. On the last day of October, in Colville, sunrise is at 7:36 am and sunset at 5:34 pm PDT. On the first day of the month, sunrise is at 6:51 am and sunset at 6:31 pm. DaylightIn Colville, the average length of the day in October is 10h and 47min. In Colville, during the entire year, snow falls for 57.6 days and aggregates up to 27.87" of snow. In Colville, Washington, during October, snow falls for 0.9 days and regularly aggregates up to 0.31" of snow. Snowfall January through April, September through December are months with snowfall in Colville. In Colville, during the entire year, the rain falls for 128.8 days and collects up to 13.62" of precipitation. Throughout October, 1.1" of precipitation is accumulated. Rainfall In October, in Colville, the rain falls for 11.8 days. HumidityIn Colville, the average relative humidity in October is 74%. October in Colville witnesses an average low-temperature hovering around a cold 33.6☏. TemperatureOctober's arrival is marked by a significant decrease in the average high-temperature, moving from a pleasant 70.7☏ in September to a fresh 53.4☏. October, like September, in Colville, Washington, is another fresh autumn month, with an average temperature varying between 33.6☏ and 53.4☏.
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