Freeze Warning
* WHAT...Lows between 19 and 25 degrees are expected Tuesday night
into Wednesday morning.
* WHERE...Fort Collins, Boulder and the western suburbs of Denver,
and Denver.
* WHEN...From 10 PM this evening to 10 AM MDT Wednesday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
* ADDITIONAL DETAILS...Some areas within these zones have already
experienced a killing freeze, particularly Weld County, Longmont
and vicinity, and the northeast Denver metro. However, many of the
more urban locations remain susceptible, and are expected to see a
killing freeze Tuesday night.
From: Oct 28, 2025 15:52
Until: Oct 29, 2025 16:00
Freeze Warning
* WHAT...For the first Freeze Warning, sub-freezing temperatures as
low as 26 expected. For the second Freeze Warning, sub-freezing
temperatures as low as 19 expected.
* WHERE...Fort Collins, Boulder and the western suburbs of Denver,
Denver, and Castle Rock.
* WHEN...For the first Freeze Warning, from 2 AM to 10 AM MDT
Tuesday. For the second Freeze Warning, from 10 PM Tuesday to 10 AM
MDT Wednesday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
From: Oct 28, 2025 02:51
Until: Oct 28, 2025 18:00
Freeze Warning
* WHAT...Low temperature Tuesday morning will be between 24 and 32
degrees. On Wednesday morning, lows will be between 18 and 26
degrees.
* WHERE...Fort Collins, Boulder and the western suburbs of Denver,
Denver, and Castle Rock.
* WHEN...For the first Freeze Warning, from 2 AM to 10 AM MDT
Tuesday. For the second Freeze Warning, from 10 PM Tuesday to 10 AM
MDT Wednesday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
From: Oct 27, 2025 18:27
Until: Oct 28, 2025 12:00
Fire Weather Watch
* AFFECTED AREA...Fire Weather Zones 216, 239, 240, 241, 245,
246, 247 and 249.
* TIMING...From Monday morning through Monday afternoon.
* WINDS...Northwest 20 to 35 mph with gusts up to 50 mph.
* RELATIVE HUMIDITY...As low as 15 percent.
* IMPACTS...Conditions will be favorable for rapid fire spread.
Avoid outdoor burning and any activity that may produce a
spark and start a wildfire.
From: Oct 19, 2025 10:39
Until: Oct 19, 2025 21:00
Frost Advisory
* WHAT...Temperatures in the 32 to 36 degree range will result in
frost formation.
* WHERE...Boulder and the western suburbs of Denver, and Denver.
* WHEN...Until 8 AM MDT this morning.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
From: Oct 19, 2025 09:55
Until: Oct 19, 2025 14:00
Freeze Warning
* WHAT...Sub-freezing temperatures in the 26 to 32 degree range
expected.
* WHERE...Most of east central, north central, and northeast
Colorado.
* WHEN...Until 8 AM MDT this morning.
* IMPACTS...Freezing temperatures could kill crops and other
sensitive vegetation, and possibly damage unprotected outdoor
plumbing.
From: Oct 19, 2025 09:55
Until: Oct 19, 2025 14:00
Freeze Warning
* WHAT...Sub-freezing temperatures in the 26 to 32 degree range
expected.
* WHERE...Most of east central, north central, and northeast
Colorado.
* WHEN...From 10 PM this evening to 8 AM MDT Sunday.
* IMPACTS...Freezing temperatures could kill crops and other
sensitive vegetation, and possibly damage unprotected outdoor
plumbing.
From: Oct 18, 2025 08:06
Until: Oct 19, 2025 12:00
Frost Advisory
* WHAT...Temperatures in the 32 to 36 degree range will result in
frost formation.
* WHERE...Boulder and Denver metro areas.
* WHEN...From 10 PM this evening to 8 AM MDT Sunday.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered. Patchy freezing
temperatures will also be possible for the coldest locations,
namely in and around Longmont and the suburbs north of Denver.
From: Oct 18, 2025 08:06
Until: Oct 19, 2025 12:00
Fire Weather Watch
The National Weather Service in Denver has issued a Fire Weather
Watch for wind and low relative humidity, which is in effect from
Monday morning through Monday afternoon.
* AFFECTED AREA...Fire Weather Zone 241.
* TIMING...Monday 11 AM MT to 6 PM MT.
* WINDS...Northwest 15 to 25 mph with gusts up to 40 mph.
* RELATIVE HUMIDITY...13 to 18%.
* IMPACTS...Conditions will be favorable for rapid fire spread.
Avoid outdoor burning and any activity that may produce a
spark and start a wildfire.
From: Oct 18, 2025 19:43
Until: Oct 19, 2025 12:00
Fire Weather Watch
* AFFECTED AREA...Fire Weather Zones 216, 239, 240, 245, 246,
247 and 249.
* TIMING...Monday 11 AM MT to 6 PM MT.
* WINDS...West 20 to 30 mph with gusts up to 45 mph.
* RELATIVE HUMIDITY...12 to 17%.
* IMPACTS...Conditions will be favorable for rapid fire spread.
Avoid outdoor burning and any activity that may produce a
spark and start a wildfire.
From: Oct 18, 2025 19:43
Until: Oct 19, 2025 12:00
Fire Weather Watch
* AFFECTED AREA...Fire Weather Zones 216, 239, 241, 246 and 247.
* TIMING...Sunday afternoon.
* WINDS...Southwest 10 to 15 mph with gusts to 25 to 30 mph.
* RELATIVE HUMIDITY...10 to 15 percent.
* IMPACTS...Conditions will be favorable for rapid fire spread.
Avoid outdoor burning and any activity that may produce a
spark and start a wildfire.
From: Oct 18, 2025 08:11
Until: Oct 18, 2025 22:00
Freeze Watch
* WHAT...Sub-freezing temperatures between 25 and 32 degrees
expected.
* WHERE...Portions of east central, north central, and northeast
Colorado.
* WHEN...From Saturday evening through Sunday morning.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
From: Oct 17, 2025 19:34
Until: Oct 18, 2025 12:00
Fire Weather Watch
The National Weather Service in Denver has issued a Fire Weather
Watch for wind and low relative humidity, which is in effect
Sunday afternoon.
* AFFECTED AREA...Fire Weather Zones 216, 239, 241, 246 and 247.
* TIMING...Sunday afternoon.
* WINDS...Southwest 10 to 15 mph with gusts 25 to 30 mph.
* RELATIVE HUMIDITY...10 to 15%.
* IMPACTS...Conditions will be favorable for rapid fire spread.
Avoid outdoor burning and any activity that may produce a
spark and start a wildfire.
From: Oct 17, 2025 19:39
Until: Oct 18, 2025 12:00
Frost Advisory
* WHAT...Temperatures between 32 and 36 degrees will result in frost
formation.
* WHERE...The Denver metro, Boulder and Longmont.
* WHEN...From 10 PM Saturday to 8 AM MDT Sunday.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered. Patchy freezing
temperatures will also be possible for the coldest locations,
namely in and around Longmont and the suburbs north of Denver.
From: Oct 17, 2025 19:34
Until: Oct 18, 2025 12:00
