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There are no active watches, warnings or advisories for Jefferson (Colorado).

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Tonight Mostly Clear	Sunday Mostly Sunny	Sunday night Mostly Clear	Monday Sunny	Monday night Fair	Tuesday Mostly Sunny	Tuesday night Partly Cloudy	Wednesday Partly Cloudy	Wednesday night Partly Cloudy

METRIC | IMPERIAL

Updated: 05/20/2012 @ 4:45:00 am

Summary / Temperature

Wind

Rain/Melted Snow

Fire Risk

Dry, Clear skies

43.9°F

---

Feels like:
43°F

24-hr
difference
-8.2°F

TEMP:	HIGH:	LOW:
Today:	46.0°F	42.0°F
Today:	12:02am	2:16am
Yesterday:	61.7°F	44.0°F
Yesterday:	12:07am	10:18pm
Record:	93.0°F	32.0°F
Record:	2005	2001
Normal:	69.0°F	45.0°F

	W 2.7 Gust: 4.0
Light Air
60-Min Avg:	1.3 mph
120-Min Avg:	1.3 mph
Max Gust:	6.0 mph 4:39am
Month:	34.5 mph May 5

Today:	0.00 in
Storm Rain:	0.27 in
Yesterday:	0.27 in
Last Rain:	5/19/2012 4:33 PM
May:	1.20 in
Last 7 Days:	0.27 in
Rain Season:¹	5.18 in
Rain Days:	25 in 2012
6 rain days in May.

Chandler Burning Index

Currently:
0.4
at 04:45 AM

Barometer

Humidity/Dew Point

Sun/Moon

Current:	30.093 inHg
1-Hr Trend:	Steady
3-Hr Trend:	Rising
Today:	30.095 30.048

Humidity:	77 %
Humidex:	41.4°F
Today:
Dew Point:	37.2°F
Wetbulb:	41.1°F

Daylight:

14:31
^{+
00:02 Min}

90% Illuminated

UV Summary/Forecast

Solar Summary

High Yest: 5.6 @ 12:03pm

20 May 2012 Very High 9.3

21 May 2012 Very High 10.2

High Yest: 580.0 @ 12:05pm

Today: 00:00 Month: 81:01 Hrs

Rise: 5:41 AM Set: 8:12 PM

Wind Chill

Heating Degree Days

Air Quality⁶

Current:	43.1°F
Today:	40.0°F at 2:21am
Yesterday:	39.0°F
Last Week:	36.2°F
Record:	-23.8°F 01-Feb-2011

Today:	4.0
May:	145.9
2012 to Date:	2694.9
Cooling Degree Days
2012 to Date:	25.2

Current AQI

33

Good

Snow³

Irrigation Index⁵

Station All Time Records

Cloud Level

Today:	0.00 in
Yesterday:	0.00 in
May:	0.00 in
Season Total:²	73.25 in
Snow Depth:	1.00 in
0 snow day in May
17 snow days this season.²

Updated at Midnight
Current:	0.01 in
7-Days Rain:	0.27 in
7-Days ET:	1.36 in
7-Day:	-1.09 in
May:	-2.43 in
Outside Now
Air Density:	1.265 kg/m³

HIGHS:	LOWS:
97.5°F 01-Aug-2008	-13.9°F 02-Feb-2011
Daytime Records
94.5°F 01-Aug-2008	-4.9°F 01-Feb-2011
Nitetime Records
81.3°F 02-Aug-2008	-9.4°F 02-Feb-2011
ICN:1 ISS:Ok CON:4.6 RCP:100%

¹ Rain season: Jan 1st to Dec 31st. ² Snow season October 1st to September 30th. ³ Snow manually measured usually around 7AM and 7PM. ⁵ Estimated amount of water needed to replace the water used by plants and evaporation from the past week. (Negative numbers mean amount of water needed, positive numbers mean excess water is present.) ⁶ Air Quality Index is provided by Minnesota Polution Control Agency and is updated hourly between the hours of 6AM and Midnight.

NWS Weather Forecast - Outlook Today & Tonight

Today

Slight Chc
Tstms
Hi 73 °F

NWS forecast: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 73. West wind 5 to 9 mph becoming east southeast.
WXSIM forecast: Mostly clear, with scattered light frost possible.

Tonight

Slight Chc
Tstms
Lo 47 °F

NWS forecast: A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 47. Southeast wind at 9 mph becoming west. Winds could gust as high as 15 mph.
WXSIM forecast: Sunny in the morning, becoming mostly sunny in the afternoon.

NWS Short Term Weather Forecast

Tonight

Slight Chance Thunderstorms. Chance for Measurable Precipitation 20%

Slight Chc
Tstms
Lo 47 °F

Monday

Sunny