Hemel Hempstead (Grovehill) weather

 Latitude N 51° 46' 21"    Longitude W 00° 27' 08"    Elevation 142 m

Top 10 Records

This page shows some of the Top 10 highs and lows recorded by this weather station. General records began on 11th June 2012, solar records on 5th Septemeber 2012.
New records (within the last 365 days, current month, or current year) are highlighted in blue text. The data is updated just after midnight each day.

Temperature Records (°C)
Min Temp
-7.92013-01-22
-6.12012-12-12
-5.72013-01-17
-5.52015-01-20
-5.42017-01-22
-5.32012-12-13
-5.32015-01-23
-5.12013-01-16
-4.82013-01-25
-4.82016-01-19
Min Avg Temp
-3.32013-01-16
-3.12012-12-12
-1.92012-12-13
-1.92013-01-22
-1.72017-01-26
-1.62013-01-17
-1.52013-01-18
-1.52016-01-19
-1.42012-12-11
-1.22013-01-20
Lowest Max Temp
-1.92013-01-16
-0.82017-01-26
-0.22013-01-20
-0.12013-01-19
-0.12013-03-24
0.12012-12-13
0.22013-01-18
0.32012-12-12
0.32013-03-25
0.42013-03-11
Smallest Daily Temp Range
0.72013-02-11
1.02017-02-09
1.02017-02-10
1.22013-12-03
1.22015-02-11
1.32013-01-19
1.32015-12-26
1.42013-01-23
1.42013-03-25
1.42015-01-21
Max Heating Deg Days
21.62013-01-16
21.22012-12-12
20.22012-12-13
20.12013-01-22
20.02017-01-26
19.92013-01-17
19.82016-01-19
19.72012-12-11
19.62013-01-18
19.42013-01-20
Max Temp
35.52015-07-01
33.22016-07-19
33.22017-06-21
32.92017-07-06
32.82013-07-22
32.72013-08-01
32.32017-06-19
32.22016-08-24
31.72016-09-13
31.32012-07-24
Max Avg Temp
26.42015-07-01
24.92017-06-19
24.82013-08-01
24.72016-07-19
24.02017-06-18
23.82017-06-21
23.52012-08-18
23.52013-07-17
23.42013-07-22
23.42017-06-20
Highest Min Temp
19.02016-09-06
18.92014-07-19
18.52013-07-23
17.82014-07-20
17.72014-07-27
17.52014-07-18
17.22016-07-17
17.22016-09-07
17.02016-08-25
16.92012-06-27
Greatest Daily Temp Range
19.82017-06-21
19.22012-09-09
19.12015-07-01
18.72012-07-24
18.72015-06-30
18.52016-07-19
18.52016-09-13
18.52017-04-08
18.12013-03-05
18.12017-04-09
Max Cooling Deg Days
8.32015-07-01
7.02016-07-19
6.82017-06-19
6.72013-08-01
6.62017-06-21
6.12017-06-18
5.92013-07-22
5.52013-07-17
5.42012-08-18
5.42013-07-13
Derived Temperature Records (°C)
Min Apparent Temp
-10.92013-01-22
-9.12013-03-11
-9.02013-03-12
-8.92012-12-12
-8.42013-01-17
-8.22015-01-20
-8.22015-01-23
-8.12013-01-15
-8.12017-01-22
-8.02012-12-13
Max Apparent Temp
36.42015-07-01
36.42017-06-21
35.62017-07-06
35.42016-07-19
34.92013-08-01
34.72013-07-22
34.62016-08-24
34.32014-07-18
34.12017-06-19
34.02012-08-18
Min Dew Point
-9.12016-01-19
-8.72013-01-22
-7.92013-04-02
-7.82013-03-11
-7.82013-04-07
-7.32013-03-12
-6.82012-12-12
-6.52013-05-02
-6.32013-01-17
-6.32017-01-22
Max Dew Point
22.02014-07-18
21.82013-07-23
21.22012-06-28
20.62013-08-01
20.62017-06-21
20.52016-09-13
20.42014-07-19
20.42016-07-20
20.32016-08-25
20.22012-08-18
Min Wind Chill
-8.62013-03-11
-8.62013-03-12
-7.92013-01-22
-6.92013-01-15
-6.92013-01-18
-6.92013-03-24
-6.32013-01-20
-6.12012-12-12
-5.72013-01-17
-5.72013-01-19
Air Frost Records
Earliest Frost Day
06 Nov2014/15
06 Nov2016/17
19 Nov2013/14
21 Nov2015/16
29 Nov2012/13
  
  
  
  
  
Latest Frost Day
28 Apr2012/13
28 Apr2015/16
25 Mar2014/15
24 Mar2013/14
11 Feb2016/17
  
  
  
  
  
Most Frost Days
652012/13
352014/15
342016/17
292015/16
92013/14
  
  
  
  
  
Consecutive Frost Days
172013-01-25
132013-04-04
112017-01-27
72015-02-07
62016-01-21
52013-03-14
52015-01-20
52016-03-08
42012-12-02
42013-02-24
Frost Season Length (days)
1602015/16
1512012/13
1402014/15
1262013/14
982016/17
  
  
  
  
  
Humidity Records (RH%)
Min Humidity
202013-05-02
222015-06-30
232012-07-23
232013-07-15
262015-07-10
272012-07-24
272013-05-01
272015-03-12
272015-08-09
282013-04-07
Greatest Daily Humidity Range
70.02015-06-30
69.02012-07-23
69.02013-05-01
67.02013-04-20
67.02016-07-18
66.02012-07-24
66.02013-07-09
64.02015-07-10
63.02012-09-09
63.02015-03-12
Smallest Daily Humidity Range
0.02017-01-07
1.02012-06-11
1.02012-10-22
1.02012-10-23
1.02013-03-08
1.02013-11-09
1.02014-01-29
1.02014-11-22
1.02014-11-26
1.02015-01-04
  
Wind Records (mph)
Max Avg Wind Spd
222014-01-25
222017-02-23
202012-06-16
202013-10-28
192015-03-31
192015-11-17
182016-03-28
172015-03-29
172016-02-01
172016-02-08
Max Wind Gust Spd
512013-10-28
492015-11-17
492017-02-23
482015-03-31
462014-01-25
452015-03-29
432016-02-01
432016-12-23
422014-02-15
412015-01-09
Lowest Max Wind Gust
52012-12-12
52013-12-02
52016-01-19
62012-10-20
62012-11-15
62013-01-16
62013-01-21
62016-10-25
62016-10-29
62017-01-08
Max Daily Wind Run (miles)
306.12015-03-31
256.52017-02-23
245.32016-02-01
242.92013-03-11
240.02016-02-08
240.02016-02-21
230.12015-11-15
229.82013-03-22
222.32015-01-09
221.12015-11-29
Min Daily Wind Run (miles)
2.02012-06-18
2.12012-06-11
2.32012-06-13
2.52014-11-15
2.72012-07-24
3.32012-12-12
3.52012-07-09
4.02012-07-05
4.12012-07-14
4.32012-06-25
Pressure Records (hPa)
Min Pressure
972.52016-03-28
973.12016-11-20
973.92014-02-14
974.12013-12-24
974.42012-12-14
974.72014-02-08
975.02015-01-30
975.62014-02-15
976.02012-11-01
976.42014-02-05
Max Pressure
1045.62016-12-27
1045.22016-12-28
1042.62014-12-29
1042.22014-12-30
1041.82015-02-17
1041.62015-02-18
1040.62013-11-26
1040.42016-12-26
1040.42016-12-29
1040.32013-11-25
Smallest Daily Press Change
1.12013-09-08
1.12014-06-16
1.22013-03-27
1.22016-03-19
1.22017-09-15
1.32013-07-13
1.32017-05-15
1.32016-06-11
1.32013-10-06
1.32016-06-08
Greatest Daily Press Change
36.62013-12-23
33.82014-12-26
26.32012-12-14
26.32014-02-14
26.22014-02-15
25.82014-01-26
25.22016-11-22
24.92013-10-28
24.82016-03-28
24.62013-12-18
 
Rain Records (mm)
Max Rain Rate (mm/h)
822.82016-10-15
172.02012-08-25
149.62014-08-14
134.02012-10-17
132.42012-09-12
126.62014-08-02
123.82012-07-29
123.82015-06-13
122.62014-05-22
122.62015-07-17
Max Rain in 1hr
16.02015-07-04
13.42016-09-16
12.82013-07-27
11.22012-10-17
11.02013-10-20
10.62015-06-13
10.02013-08-05
9.82014-08-02
9.62016-06-17
9.42014-08-14
Max Daily rain
34.02016-09-16
30.02017-05-17
24.82015-07-24
24.42012-10-05
24.22013-12-23
23.62012-10-17
23.02014-02-07
21.62014-08-25
21.02013-10-20
19.82014-10-13
Driest Months
7.2Apr 2017
15.2Sep 2014
17.0Jul 2016
18.8Dec 2016
20.2Jun 2014
22.6Oct 2016
24.2Jun 2013
26.2Mar 2014
26.4Jul 2014
26.4Mar 2015
Wettest Months
153.0Jan 2014
133.6Feb 2014
110.0Dec 2013
104.6Oct 2013
104.2Oct 2012
102.4Dec 2012
101.2Nov 2012
88.2Aug 2014
88.2Nov 2014
84.2Jul 2012
Wettest Years
7862014
6922013
6462015
5992016
5312012
4042017
  
  
  
  
Consecutive Dry Days (end date)
182013-07-22
172017-06-26
142016-08-18
132014-09-14
122013-09-06
122014-04-19
112013-06-10
112015-04-23
102012-09-09
102017-05-11
Consecutive Wet Days (end date)
222014-01-19
192014-10-21
162013-12-27
162016-01-14
152012-10-29
142013-09-20
142013-11-13
132014-11-18
132015-01-15
132016-11-24
Most Dry Days in a Month
23Jul 2016
22May 2016
22May 2017
21Sep 2012
21Jun 2013
21Jul 2013
21Sep 2014
20Aug 2013
20Jul 2014
20Apr 2015
Most Rain Days in a Month
30Jan 2014
27Nov 2014
27Jan 2016
26Oct 2012
26Oct 2014
26Nov 2015
25Dec 2012
25Jan 2015
25Dec 2015
24Nov 2013
Solar Records (since 5 September 2012)
Max UV Index
0.02012-06-11
0.02012-06-12
0.02012-06-13
0.02012-06-14
0.02012-06-15
0.02012-06-16
0.02012-06-17
0.02012-06-18
0.02012-06-19
0.02012-06-20
Max Sunshine hours
14.92015-06-11
14.72016-06-06
14.52013-07-06
14.42016-05-05
14.32013-07-07
14.22016-07-19
14.22017-05-26
13.92015-06-30
13.72013-05-03
13.72013-07-15
Max Solar Radiation Wm⁻²
13062016-07-15
13012016-07-31
12922013-06-08
12882016-07-12
12712016-07-16
12462014-07-13
12462015-06-21
12392016-06-25
12202015-06-22
12182017-06-07
Lowest Max Solar Radiation Wm⁻²
282015-01-01
282016-12-10
292014-01-01
302013-01-14
342012-12-20
412013-12-21
422014-12-22
472012-12-19
472014-11-23
482014-12-04
Max Evapotranspiration (mm)
5.62015-06-30
5.32015-07-01
5.32016-07-19
5.32017-06-19
5.22013-07-07
5.22013-07-19
5.22014-07-03
5.22016-06-06
5.22017-05-26
5.12013-06-30

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