April 2003 Temperatures in Bolton
Average max: 15.0C
Highest max: 25.8C, 16th
Lowest max: 9.0C, 1st

Average min: 5.1C
Highest min: 9.7C 16th
Lowest min: -1.3C, 10th

Average temp(˝max+min): 10.1C

No. days with rain observed: 11
No. days with thunder heard: 1

No. air frosts observed: 2
No. ground frosts observed: 3

No. days above 25C: 1
No. days above 20C:3

An exceptionally warm month with a remarkable hot spell mid-month. The month was also dry with little rain from the 3rd until the 21st. The month started wet however with heavy rain from the 1st till the 2nd. From the 3rd till the 6th it became dry and mild but fairly cloudy, but from the 8th till the 18th it became much sunnier, though there were frosts in the early part of this period, the lowest reading of the month being -1.3C on the 10th. The 15th to the 17th saw a hot spell, culminating in 25.8C on the 16th, probably representing at least a once on 50 year event for mid April. The 19th till the 23rd saw cloudier and rather more unsettled conditions, with thunder and hail on the 19th. The 24th till the 30th was much wetter but still fairly warm.
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