Like December 2016 before it, another very dry month for winter due to almost persistant high pressure, although now in a different position meant lower temperatures, and low pressure took over for the final week.
Temperature: [Minimum]:
Lowest: -1.5 degs C on the 3rd. Lowest temperature since February 2016.
Highest: 10.1 degs C on the 31st.
Average minimum: 5.15 degs C. Lowest since March 2016, and 5th lowest January since at least 2004.
Nights with temperature below 5 degs C = 15. Most since March 2016.
Nights with temperature below 0 degs C = 1. First since March 2016.
Temperature: [Maximum]:
Lowest: 5.8 degs C on the 3rd. Lowest daytime temperature since February 2015, and in January since 2013.
Highest: 12.3 degs C on the 30th. The temperature has exceeded this every month since this blog began in October 2003!
Average maximum: 9.35 degs C. 2 degs C below December 2016. 2nd lowest of the last 14 Januaries with 2010 the lowest at 8.33. Lowest of any month since February 2015.
Rainfall:
Total: 80.3 mm. Driest January since 2012 and 2nd driest of the last 9.
December 2016: 61.7 mm.
January 2016: 233.6 mm.
Wettest day: 18.5 mm on the 12th.
Only other day with >10 mm: 29th: 15.0 mm.
Only 0.9 mm from 2nd to 8th.
36.8 mm from the 27th.
Completely dry days: 12. Equals 2011 for the most dry days of the last 9 Januaries. November and December 2016 also had 12 each.
Days with no measurable rain: 15.
Cumulatively: 2017: 80.3 mm.
2016: 233.6 mm [-65.63%].
Thunder:
None.
Pressure:
Lowest: 999.7 on the 12th
Highest: 1040.0 on the 18th
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