History for Helena, MT

Thursday, February 21, 2013 — View Current Conditions

Thursday, February 21, 2013

	Actual	Average	Record
Temperature
Mean Temperature	27 °F	29 °F
Max Temperature	36 °F	40 °F	63 °F (1961)
Min Temperature	18 °F	18 °F	-23 °F (1910)
Degree Days
Heating Degree Days	38	36
Month to date heating degree days	688	800
Since 1 July heating degree days	4897	5318
Cooling Degree Days	0	0
Month to date cooling degree days	0	0
Year to date cooling degree days	0	0
Moisture
Dew Point	12 °F
Average Humidity	53
Maximum Humidity	73
Minimum Humidity	32
Precipitation
Precipitation	0.00 in	0.02 in	0.49 in (1914)
Month to date precipitation	0.31	0.22
Year to date precipitation	0.66	0.58
Snow
Snow	0.00 in	0.20 in	5.50 in (1914)
Month to date snowfall	6.3	3.9
Since 1 July snowfall	35.7	26.2
Snow Depth	0.00 in
Sea Level Pressure
Sea Level Pressure	30.03 in
Wind
Wind Speed	9 mph (WSW)
Max Wind Speed	23 mph
Max Gust Speed	29 mph
Visibility	10 miles
Events

T = Trace of Precipitation, MM = Missing Value

Source: NWS Daily Summary

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Astronomy

May. 19, 2013	Rise	Set
Actual Time	7:21 AM MST	6:02 PM MST
Civil Twilight	6:50 AM MST	6:33 PM MST
Nautical Twilight	6:15 AM MST	7:08 PM MST
Astronomical Twilight	5:40 AM MST	7:43 PM MST
Moon	2:11 PM MST (2/21)	4:38 AM MST (2/21)
Length Of Visible Light	11h 42m
Length of Day	10h 41m

Waxing Gibbous, 84% of the Moon is Illuminated
Feb 21 Waxing Gibbous	Feb 25 Full	Mar 4 Last Quarter	Mar 11 New	Mar 19 First Quarter

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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	26.1 °F	20.5 °F	12.0 °F	55%	30.02 in	10.0 mi	SW	4.6 mph	-	N/A	Partly Cloudy
1:53 AM	26.1 °F	21.9 °F	10.9 °F	53%	30.02 in	10.0 mi	SW	3.5 mph	-	N/A	Clear
2:53 AM	23.0 °F	15.8 °F	12.0 °F	63%	30.03 in	10.0 mi	West	5.8 mph	-	N/A	Clear
3:53 AM	21.0 °F	-	12.0 °F	68%	30.05 in	10.0 mi	Calm	Calm	-	N/A	Clear
4:53 AM	19.9 °F	-	10.9 °F	68%	30.05 in	10.0 mi	Calm	Calm	-	N/A	Clear
5:53 AM	19.0 °F	-	10.9 °F	71%	30.06 in	10.0 mi	Calm	Calm	-	N/A	Clear
6:53 AM	19.0 °F	-	10.9 °F	71%	30.08 in	10.0 mi	Calm	Calm	-	N/A	Clear
7:53 AM	19.9 °F	-	12.0 °F	71%	30.10 in	10.0 mi	Calm	Calm	-	N/A	Clear
8:53 AM	24.1 °F	-	15.1 °F	69%	30.10 in	10.0 mi	Calm	Calm	-	N/A	Clear
9:53 AM	30.0 °F	20.0 °F	12.0 °F	47%	30.07 in	10.0 mi	West	12.7 mph	-	N/A	Clear
10:53 AM	30.9 °F	17.8 °F	10.0 °F	42%	30.08 in	10.0 mi	West	23.0 mph	27.6 mph	N/A	Clear
11:53 AM	32.0 °F	19.8 °F	9.0 °F	38%	30.07 in	10.0 mi	West	20.7 mph	27.6 mph	N/A	Partly Cloudy
12:53 PM	34.0 °F	23.8 °F	9.0 °F	35%	30.04 in	10.0 mi	West	16.1 mph	-	N/A	Clear
1:53 PM	35.1 °F	24.5 °F	9.0 °F	34%	30.01 in	10.0 mi	West	18.4 mph	26.5 mph	N/A	Clear
2:53 PM	34.0 °F	23.0 °F	9.0 °F	35%	30.02 in	10.0 mi	West	18.4 mph	26.5 mph	N/A	Mostly Cloudy
3:53 PM	33.1 °F	23.4 °F	10.0 °F	38%	30.03 in	10.0 mi	WSW	13.8 mph	-	N/A	Mostly Cloudy
4:53 PM	33.1 °F	23.4 °F	10.9 °F	40%	30.02 in	10.0 mi	West	13.8 mph	-	N/A	Overcast
5:53 PM	32.0 °F	25.6 °F	12.0 °F	44%	30.02 in	10.0 mi	West	6.9 mph	-	N/A	Scattered Clouds
6:53 PM	32.0 °F	28.7 °F	12.0 °F	44%	30.02 in	10.0 mi	SW	3.5 mph	-	N/A	Overcast
7:53 PM	32.0 °F	23.0 °F	10.9 °F	42%	30.02 in	10.0 mi	WSW	11.5 mph	-	N/A	Mostly Cloudy
8:53 PM	30.9 °F	21.7 °F	15.1 °F	52%	30.01 in	10.0 mi	SW	11.5 mph	-	N/A	Overcast
9:53 PM	30.0 °F	23.2 °F	16.0 °F	56%	30.01 in	10.0 mi	WSW	6.9 mph	-	N/A	Overcast
10:53 PM	30.2 °F	23.4 °F	15.8 °F	55%	29.86 in	10.0 mi	WSW	6.9 mph	-	N/A	Overcast
11:53 PM	30.9 °F	22.8 °F	16.0 °F	54%	29.99 in	10.0 mi	West	9.2 mph	-	N/A	Mostly Cloudy
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