Site Conditions

Weather

The graphs are provided WeatherSpark.com and updated graphs are available by click on the link WeatherSpark.com.

Average Temperature in Derby The warm season lasts for 2.9 months, from 13 June to 10 September, with an average daily high temperature above 18°C. The hottest month of the year in Derby is July, with an average high of 21°C and low of 12°C.The cool season lasts for 4.0 months, from 16 November to 16 March, with an average daily high temperature below 10°C. The coldest month of the year in Derby is January, with an average low of 2°C and high of 7°C.

Rainfall To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Derby experiences some seasonal variation in monthly rainfall.Rain falls throughout the year in Derby. The month with the most rain in Derby is October, with an average rainfall of 55 millimetres.The month with the least rain in Derby is April, with an average rainfall of 34 millimetres.

Wind This section discusses the wide-area hourly average wind vector (speed and direction) at 10 metres above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.The average hourly wind speed in Derby experiences significant seasonal variation over the course of the year.The windier part of the year lasts for 5.7 months, from 12 October to 2 April, with average wind speeds of more than 18.4 kilometres per hour. The windiest month of the year in Derby is January, with an average hourly wind speed of 21.3 kilometres per hour.The calmer time of year lasts for 6.3 months, from 2 April to 12 October. The calmest month of the year in Derby is July, with an average hourly wind speed of 15.6 kilometres per hour.

Growing Season Definitions of the growing season vary throughout the world, but for the purposes of this report, WeatherSpark define it as the longest continuous period of non-freezing temperatures (≥ 0°C) in the year.

The growing season in Derby typically lasts for 7.0 months (216 days), from around 12 April to around 14 November, rarely starting before 15 March or after 3 May, and rarely ending before 19 October or after 9 December.