The growing season in London typically lasts for 5.7 months (175 days), from around April 27 to around October 19, rarely starting before April 11 or after May 15, and rarely ending before October 1 or after November 6. Shortwave radiation includes visible light and ultraviolet radiation. On average January is the 2nd driest month of the year in Niagara Falls with around 68mm 2.7 inches of rain making it a reasonably dry time to visit. The climate profile is taken from closest available data source to London. July is the hottest month in London with an average temperature of 19°C (66°F) and the coldest is January at 5°C (41°F) with the most daily sunshine hours at 7 in June. The lowest daily average high temperature is 47°F on January 18. The shaded overlays indicate night and civil twilight. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon. Daily high temperatures tend to average in the upper 8 C – 9 C (45 F) with a few of the warmer days reaching afternoon temperatures around 12 C – 13 C (mid-50s F). From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The climate in London during January can be summarized as cold and reasonably dry. Central Ontario. The hottest month of the year is normally July when the peak temperature can be 90 F (30 C) but the average temperature in July is about 70 F (22 C). The highest chance of overcast or mostly cloudy conditions is 70% on January 10. The average daily incident shortwave solar energy in London is gradually increasing during January, rising by 0.6 kWh, from 1.3 kWh to 1.9 kWh, over the course of the month. The wettest month is October with an average of 71mm of rain. This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. London typically has 57 frosty days a year. All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus. In this month you will hardly see any sunshine with 99 … Daily low temperatures decrease by 4°F, from 20°F to 16°F, rarely falling below … Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC. On the flip side this corresponds to an average of 3.2 hours of sunshine per day. Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database . There are usually 12 days with some rain in Toronto, Ontario in January and the average monthly rainfall is 54mm. From November to April, it can remain below freezing all day long. The average hourly temperature, color coded into bands. Daily highs are around 8°C over the course of January, rising above 12°C or going under 3°C very rarely. All Year Climate & Weather Averages in London. The average sliding 31-day liquid-equivalent snowfall during January in London is essentially constant, remaining about 0.4 inches throughout, and rarely exceeding 1.0 inches or falling to 0.0 inches. Copyright © 2021 Current Results Publishing Ltd. Precipitation Averages for Ontario in January. This month is known as a chilly month. AVERAGE DECEMBER TEMPERATURES. With an average of 20.2 °C | 68.4 °F, July is the warmest month. The earliest sunset is 5:01 PM on January 1 and the latest sunset is 35 minutes later at 5:36 PM on January 31. The average temperatures in July range from 23°C (74°F) in southwestern Ontario, to 19°C (64°F) in eastern Ontario. Daily high temperatures decrease by 3°F, from 31°F to 28°F, rarely falling below 15°F or exceeding 44°F. The area within 2 miles of London is covered by artificial surfaces (85%), within 10 miles by cropland (56%) and grassland (19%), and within 50 miles by cropland (52%) and water (22%). 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