| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Monthly
Climate Summary for December 2008 at Luton (Cranleigh Gardens) |
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
home |
daily |
|
|
|
| Cold, changeable first half;
milder interlude before Christmas; cold dry end |
|
|
|
back |
forward |
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Overall mean
temperature was |
3.4 |
ēC |
which is |
-1.5 |
degC |
compared with the 1971-2000 average |
|
|
|
|
|
|
| Mean day
maximum (09-21) was |
5.4 |
ēC |
which is |
-1.7 |
degC |
compared with the 1971-2000 average |
|
|
|
|
|
|
| Mean night
minimum (21-09) was |
1.3 |
ēC |
which is |
-1.4 |
degC |
compared with the 1971-2000 average |
|
|
|
|
|
|
| Mean 24hr
maximum (09-09) was |
5.7 |
ēC |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Mean 24hr
minimum (09-09) was |
0.7 |
ēC |
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
Highest day max was |
12.2 |
ēC |
on
the |
20 |
|
|
|
|
|
|
|
|
|
|
|
| |
Lowest day max was |
-0.1 |
ēC |
on the |
31 |
|
|
|
|
|
|
|
|
|
|
|
| |
Highest night min was |
9.8 |
ēC |
on the |
22 |
|
|
|
|
|
|
|
|
|
|
|
| |
Lowest night min was |
-4.4 |
ēC |
on the |
30 |
|
|
|
|
|
|
|
|
|
|
|
| |
Lowest grass min was |
-9.4 |
ēC |
on the |
30 |
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Total rainfall
this month was |
35.6 |
mm |
which is |
52.6 |
per cent |
of the 1971-2000 average |
|
|
|
|
|
|
|
| |
Highest daily fall was |
10.4 |
mm |
on the |
13 |
|
|
|
|
|
|
|
|
|
|
|
| Number of
hours with rain was |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Equiv. TSR
rainfall duration was |
44.0 |
hrs |
which is |
70.7 |
per cent |
of the 1971-2000 average |
|
|
|
|
|
|
|
| |
Highest no of wet hrs |
|
hrs |
on the |
|
|
|
|
|
|
|
|
|
|
|
|
| |
Highest duration |
12.0 |
hrs |
on the |
13 |
|
|
|
|
|
|
|
|
|
|
|
| |
Mean rainfall intensity |
0.81 |
mm/hr |
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Total CS
sunshine this month was |
57.8 |
hrs |
which is |
119.2 |
per cent |
of the 1971-2000 average |
|
|
|
|
|
|
|
| Equiv. C/S sunshine total was |
|
hrs |
which is |
|
per cent |
of the 1971-2000 average |
|
|
|
|
|
|
|
| |
Highest daily sun was |
5.9 |
hrs |
on the |
7 |
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Maximum snow depth
was |
0.0 |
cm |
on
the |
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Mean sea-level
pressure at 09Z |
1019.9 |
mbar |
which is |
+5.3 |
mbar |
compared with the 1961-1990 average |
|
|
|
|
|
|
| |
Highest pressure at 09Z |
1040.1 |
mbar |
on the |
26 |
|
|
|
|
|
|
|
|
|
|
|
| |
Lowest
pressure at 09Z |
979.6 |
mbar |
on the |
4 |
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Number of days
with: |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Air Frost |
14 |
|
0.2mm rain |
14 |
|
No sun |
9 |
|
Snow lying |
0 |
|
|
|
|
|
|
|
| Grnd Frost |
22 |
|
1.0mm |
7 |
|
3h sun |
10 |
|
Snow/sleet |
4 |
|
|
|
|
|
|
|
| Max < 0ēC |
1 |
|
5mm |
3 |
|
6h sun |
0 |
|
Hail |
0 |
|
|
|
|
|
|
|
| Max > 10 |
4 |
|
10mm |
1 |
|
9h sun |
0 |
|
Thunder |
0 |
|
|
|
|
|
|
|
| Max > 20 |
0 |
|
25mm |
0 |
|
12h sun |
0 |
|
Fog at 09Z |
4 |
|
|
|
|
|
|
|
| Max > 30 |
0 |
|
|
|
|
15h sun |
0 |
|
Gale |
0 |
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Notable events
during the month: |
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|