Temperature Charts

Did you have a go at the questions that I posed on Monday? If you haven’t had chance to look yet, head on over there now, while I insert a picture!

So the answers…

1. The place in the British Isles is line E. It’s Wrexham, Wales. If you look at the January and February temperatures, A, B, and C are too hot, while F is way too cold.

D isn’t too far out. This January, D and E are almost the same, but remember that this is just a snapshot of the temperature on one day and this year our weather is unusually mild.

Because it’s a snapshot the lines on the chart jump about a bit and January 2019 is not the same as January 2018. However, if you were to record the temperature every day and then calculate the average for each month, you would get a much smoother curve and a more similar result from one year to the next.

Average temperatures over many years are used to produce climate graphs. Follow the link to find one for a town near you.

2. The southern hemisphere has summer while we have winter, and visa versa. Only one line on the chart shows higher temperatures in January than July and that is line C. It’s Cape Town, South Africa.

3. Have you ever wondered why, on a gorgeous summer day, the sea around Britain always seems rather chilly?

The sea changes temperature only very slowly, and is always mixing, so it never gets as hot as the land, nor as cold. This means that the place furthest from the sea is likely to have the biggest difference between winter and summer temperatures and that is line F.

It’s Saskatoon, Canada, which is only slightly further south than Wrexham (line E). Wrexham is not on the coast, but it is a lot nearer to the sea than Saskatoon and look at the difference that makes.

The nearby sea keeps all the British Isles relatively cool in the summer and relatively warm in the winter, compared to somewhere like central Canada.

So, in the winter, the sea should seem warm compared to the land temperature. Maybe New Year’s Day sea swimmers are not as crazy as they seem!