Contents
- Weather in July
- Frequently asked questions
- Average temperature in July
- Average pressure in July
- Average wind speed in July
- Average humidity in July
- Average rainfall in July
- Average rainfall days in July
- Average daylight in July
- Average sunshine in July
- Average sunshine days in July
- Average UV index in July
- Average cloud cover in July
- Average visibility in July
Weather in July
Temperature
The coldest temperatures occur during July, when averages reach a peak of 18.9°C (66°F) and a low of 6.3°C (43.3°F).Humidity
The average relative humidity in July in Derby, South Africa, is 44%.Rainfall
July and August are months with the least rain in Derby when the rain falls for 1.3 days and typically aggregates up to 1mm (0.04") of rain.Daylight
In July, the average length of the day in Derby is 10h and 41min.On the first day of July in Derby, sunrise is at 06:59 and sunset at 17:32. On the last day of the month, sunrise is at 06:50 and sunset at 17:45 SAST.
Sunshine
In Derby, South Africa, the average sunshine in July is 7.7h.UV index
The months with the lowest UV index in Derby are May through July, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: In July, the maximum UV index of 4 translates into these guidelines:
Be vigilant - A duty to shield skin and eyes from injury exists. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Frequently asked questions
What are the coldest months in Derby?
What are the temperatures in Derby in July?
What is the average humidity in July in Derby?
What is the driest month in Derby?
How much does it rain in Derby in July?
How many hours of daylight does Derby have in July?
When is the sunrise / sunset in July in Derby?
How many hours of sunshine does Derby have in July?
When is the lowest UV index in Derby?
What is the UV index reading in July in Derby?
Average temperature in July
Derby, South Africa
- Average high temperature in July: 18.9°C
The warmest month (with the highest average high temperature) is January (29.3°C).
The month with the lowest average high temperature is July (18.9°C).
- Average low temperature in July: 6.3°C
The months with the highest average low temperature are January and December (18°C).
The coldest month (with the lowest average low temperature) is July (6.3°C).
Average pressure in July
Derby, South Africa
- Average pressure in July: 1024.4mbar
The month with the highest atmospheric pressure is July (1024.4mbar).
The month with the lowest atmospheric pressure is January (1012.3mbar).
Average wind speed in July
Derby, South Africa
- Average wind speed in July: 8km/h
The windiest month (with the highest average wind speed) is October (10.6km/h).
The calmest months (with the lowest average wind speed) are March and May (7km/h).
Average humidity in July
Derby, South Africa
- Average humidity in July: 44%
The month with the highest relative humidity is February (61%).
The month with the lowest relative humidity is September (32%).
Average rainfall in July
Derby, South Africa
- Average rainfall in July: 1mm
The wettest month (with the highest rainfall) is December (95mm).
The driest months (with the least rainfall) are July and August (1mm).
Average rainfall days in July
Derby, South Africa
- Average rainfall days in July: 1.3 days
The month with the highest number of rainy days is January (20.7 days).
The month with the least rainy days is August (1 days).
Average daylight in July /
Average sunshine in July
Derby, South Africa
- Average daylight in July: 10h and 4min
The month with the longest days is December (Average daylight: 13h and 42min).
The month with the shortest days is June (Average daylight: 10h and 30min).
- Average sunshine in July: 7h and 4min
The month with the most sunshine is October (Average sunshine: 11h and 54min).
The months with the least sunshine are June and August (Average sunshine: 7h and 30min).
Average sunshine days in July
Derby, South Africa
- Average sunshine days in July: 29.3 days
The month with the most sunshine days is July (29.3 days).
The month with the least sunshine days is January (6.6 days).
Average UV index in July
Derby, South Africa
- Average UV index in July: 4
The months with the highest UV index are January, February, March, October, November and December (UV index 6).
The months with the lowest UV index are May, June and July (UV index 4).
Average cloud cover in July
Derby, South Africa
- Average cloud cover in July: 5
The months with the most cloud cover are January and December (Cloud cover 24).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in July
Derby, South Africa
- Average visibility in July: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Derby, South Africa
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