Monthly Climate Summary for  January 2004  at Luton (Cranleigh Gardens)
                           
               Very unsettled with frequent rain; heavy snow squall on the 28th        
home daily
Overall mean temperature was 4.9 ēC which is +0.9 degC compared with the 1971-2000 average back forward
Mean day maximum (09-21) was 7.1 ēC which is +0.7 degC compared with the 1971-2000 average
Mean night minimum (21-09) was 2.7 ēC which is +1.0 degC compared with the 1971-2000 average
Mean 24hr maximum (09-09) was 7.6 ēC
Mean 24hr minimum (09-09) was 2.1 ēC
Highest day max was 11.3 ēC on  the   31
Lowest day max was 3.3 ēC on  the 3
Highest night min was 9.4 ēC on  the 11
Lowest night min was -4.4 ēC on  the 29
Lowest grass min was -7.4 ēC on  the 30
Total rainfall this month was 87.1 mm which is 127.9 per  cent of the 1971-2000 average
Highest daily fall was 12.2 mm on  the 7
Number of hours with rain was
Dynes' TSR rainfall duration was 101.3 hrs which is 157.6 per  cent of the 1971-2000 average
Highest no of wet hrs hrs on  the
Highest duration 10.0 hrs on  the 7
Mean rainfall intensity 0.86 mm/hr
Total CS sunshine this month was 53.1 hrs which is 112.2 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 7.8 hrs on  the 29
Maximum  snow depth  was 8.0 cm on  the  29
Mean sea-level pressure at 09Z 1007.1 mbar which is -7.5 mbar compared with the 1961-1990 average
Highest pressure at 09Z 1026.5 mbar on  the 18
Lowest  pressure at 09Z 982.0 mbar on  the 13
Number of days with:
Air Frost 10 0.2mm rain 24 No  sun 13 Snow lying 2
Grnd Frost 16 1.0mm 18 3h  sun 9 Snow/sleet 5
Max < 0ēC 0 5mm 7 6h  sun 2 Hail 1
Max > 10 5 10mm 2 9h  sun 0 Thunder 1
Max > 20 0 25mm 0 12h sun 0 Fog at 09Z 2
Max > 30 0 15h sun 0 Gale 1
Notable events during the month:                              
Remarkable snow squall hit at 1610Z on the 28th, 8cm of snow fell in under two hours