Steventon Weather

December 2021

After an unsettled end to October the barometer began to rise rapidly, heralding a dry start to November. The first week was mainly cloudy with daytime temperatures ranging from 8.7°C to 12.5°C but some nights cleared bringing three ground frosts with the coldest at 0.5°C on 5th.

Low pressure began to move to move in from 11th bringing drizzly rain for the next four nights, but they only added up to 4.1mm. The temperature reached 14.9°C on 9th, the warmest day of the month.

From 13th -24th a slow moving anticyclone brought high pressure and mainly overcast conditions with a few sunny spells but no significant rain. The temperature gradually dropped to single figures by 21st. Night temperatures over this period depended on the clarity of the sky and ranged from 0.7°C on 22nd/23rd to 10.8°C on 19th. On the latter date the maximum was 11.1°C a difference over 24 hours of just 0.9°C. There were ground frosts on 22nd, 23rd & 25th.

Pressure fell sharply again from 25th and 9.0mm rain fell in the night of 26th/27th the only significant fall during the month, brought by the high NNW winds of Storm Arwen.

It rapidly calmed down and the temperature dropped. The lowest temperatures of the month were on 28th; -1.3°C at night and 3.5°C during the day. It also fell to -1.2°C on 29th. On the 30th the weather changed again, the temperature reaching 11.5°C and only falling to 5.0°C at night. The average temperature for the month was just 0.72°C above average.

The total rainfall was 17.3mm just 23% of my 25 year average, the driest November I have recorded since 1992. The previous driest was 27.4mm in 2004. Rainfall for the year to date is 600mm, 97% of average. That for the Autumn months of September, October and November was 141.5mm, 71.9% of average.

Overall November 2021 was dull and dry with mainly light winds from all quarters. It was mild, with the only cold spell right at the end of the month.

Mike Wilkins

25 year Rainfall averages are from 1992-2016
30 year Temperature averages are from 1981-2010

Weather Summary table for 2020 at Steventon, Oxfordshire.

30 year temperature averages for Steventon are from 1981-2010
Oxford rainfall averages are from 1992-2016

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MonthTemperature
°C
Rainfall
mm%
25yr avg.
MaxMinMonthly Average30yr
Avg.
>30yr
Avg.
 25yr
avg.
January 13.0 -1.7 9.96 4.57 2.39 66.3 66.4 99.8
February 13.2 -0.9 7.19 4.69 2.50 112.7 45.9 245.3
March 15.9 -0.5 7.60 6.86 0.74 48.9 41.9 116.6
April 24.2 0.1 11.99 9.17 2.82 47.8 53.0 90.2
May 26.2 1.6 14.69 12.64 2.05 1.4 60.2 2.3
June 31.9 7.6 17.06 15.82 1.24 65.3 47.7 136.8
July 35.2 8.9 18.09 17.91 0.18 30.4 49.8 79.1
August 34.5 10.7 19.64 17.43 2.21 101.9 56.1 181.6
September 28.6 4.8 15.69 14.50 1.19 36.1 51.8 69.8
October 17.6 6.0 11.44 10.76 0.68 170.8 70.0 244.o
November 16.5 0.2 8.88 6.94 1.94 54.5 74.9 72.7
December 13.2 -1.7 5.65 4.76 0.89 76.8 64.1 119.8
Year 35.5 -1.7 12.07 10.50 1.57 821.9 682.0 120.5

Summary data from Mike Wilkins, January 2021