History for Helena, MT

Tuesday, December 4, 2012 — View Current Conditions

Tuesday, December 4, 2012

	Actual	Average	Record
Temperature
Mean Temperature	42 °F	24 °F
Max Temperature	51 °F	34 °F	64 °F (1918)
Min Temperature	32 °F	15 °F	-24 °F (1972)
Degree Days
Heating Degree Days	23	41
Month to date heating degree days	92	161
Since 1 July heating degree days	1770	2043
Cooling Degree Days	0	0
Month to date cooling degree days	0	0
Year to date cooling degree days	531	406
Moisture
Dew Point	26 °F
Average Humidity	50
Maximum Humidity	61
Minimum Humidity	39
Precipitation
Precipitation	0.00 in	0.01 in	0.32 in (1977)
Month to date precipitation	0.08	0.06
Year to date precipitation	8.98	10.88
Snow
Snow	0.00 in	0.20 in	5.80 in (1977)
Month to date snowfall	0.0	0.9
Since 1 July snowfall	17.0	9.7
Snow Depth	0.00 in
Sea Level Pressure
Sea Level Pressure	30.01 in
Wind
Wind Speed	9 mph (South)
Max Wind Speed	25 mph
Max Gust Speed	33 mph
Visibility	10 miles
Events

T = Trace of Precipitation, MM = Missing Value

Source: NWS Daily Summary

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Astronomy

May. 22, 2013	Rise	Set
Actual Time	7:55 AM MST	4:40 PM MST
Civil Twilight	7:21 AM MST	5:15 PM MST
Nautical Twilight	6:42 AM MST	5:53 PM MST
Astronomical Twilight	6:06 AM MST	6:30 PM MST
Moon	10:46 PM MST (12/4)	11:38 AM MST (12/4)
Length Of Visible Light	9h 54m
Length of Day	8h 45m

Waning Gibbous, 69% of the Moon is Illuminated
Dec 4 Waning Gibbous	Dec 6 Last Quarter	Dec 13 New	Dec 19 First Quarter	Dec 28 Full

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Hourly Observations

Time (MST)	Temp.	Windchill	Dew Point	Humidity	Pressure	Visibility	Wind Dir	Wind Speed	Gust Speed	Precip	Conditions
12:53 AM	39.9 °F	32.1 °F	19.9 °F	45%	30.17 in	10.0 mi	SSW	13.8 mph	-	N/A	Clear
1:53 AM	41.0 °F	33.9 °F	19.0 °F	41%	30.14 in	10.0 mi	SW	12.7 mph	23.0 mph	N/A	Clear
2:53 AM	35.1 °F	32.2 °F	21.0 °F	57%	30.15 in	10.0 mi	East	3.5 mph	-	N/A	Clear
3:53 AM	36.0 °F	30.3 °F	19.9 °F	52%	30.11 in	10.0 mi	ESE	6.9 mph	-	N/A	Clear
4:53 AM	33.1 °F	-	21.9 °F	64%	30.10 in	10.0 mi	Calm	Calm	-	N/A	Mostly Cloudy
5:53 AM	36.0 °F	31.1 °F	21.0 °F	55%	30.08 in	10.0 mi	ESE	5.8 mph	-	N/A	Overcast
6:53 AM	39.9 °F	31.1 °F	21.0 °F	47%	30.09 in	10.0 mi	SSW	17.3 mph	28.8 mph	N/A	Overcast
7:53 AM	39.0 °F	34.0 °F	25.0 °F	57%	30.05 in	10.0 mi	South	6.9 mph	-	N/A	Overcast
8:53 AM	39.0 °F	32.3 °F	25.0 °F	57%	30.03 in	10.0 mi	ESE	10.4 mph	23.0 mph	N/A	Overcast
9:53 AM	44.1 °F	-	24.1 °F	45%	30.01 in	10.0 mi	Calm	Calm	-	N/A	Overcast
10:53 AM	42.1 °F	37.1 °F	26.1 °F	53%	30.01 in	-	West	8.1 mph	-	N/A	Unknown
11:53 AM	46.9 °F	-	27.0 °F	46%	29.98 in	10.0 mi	Variable	3.5 mph	-	N/A	Mostly Cloudy
12:53 PM	50.0 °F	-	27.0 °F	41%	29.95 in	10.0 mi	South	18.4 mph	26.5 mph	N/A	Mostly Cloudy
1:53 PM	50.0 °F	-	27.0 °F	41%	29.95 in	10.0 mi	South	19.6 mph	29.9 mph	N/A	Overcast
2:53 PM	50.0 °F	-	28.0 °F	43%	29.96 in	10.0 mi	South	12.7 mph	27.6 mph	N/A	Overcast
3:53 PM	51.1 °F	-	28.0 °F	41%	29.97 in	10.0 mi	SSE	5.8 mph	-	N/A	Mostly Cloudy
4:53 PM	50.0 °F	-	28.9 °F	44%	29.98 in	10.0 mi	South	12.7 mph	23.0 mph	N/A	Overcast
5:53 PM	50.0 °F	-	28.9 °F	44%	29.96 in	10.0 mi	SE	10.4 mph	-	N/A	Mostly Cloudy
6:53 PM	48.9 °F	-	30.9 °F	50%	29.94 in	10.0 mi	Variable	3.5 mph	-	N/A	Clear
7:53 PM	48.9 °F	-	32.0 °F	52%	29.96 in	10.0 mi	ESE	5.8 mph	-	N/A	Clear
8:53 PM	48.9 °F	-	32.0 °F	52%	29.95 in	10.0 mi	Calm	Calm	-	N/A	Overcast
9:53 PM	48.9 °F	-	33.1 °F	54%	29.94 in	10.0 mi	SSW	8.1 mph	-	N/A	Overcast
10:53 PM	50.0 °F	-	33.1 °F	52%	29.92 in	10.0 mi	SSW	11.5 mph	23.0 mph	N/A	Overcast
11:53 PM	50.0 °F	-	32.0 °F	50%	29.89 in	10.0 mi	South	12.7 mph	21.9 mph	N/A	Scattered Clouds
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