Monthly outlook for Merna, WY: average high 45.2°, average low 26.2°. That is 0.3° above the climate normal for October. Precipitation is expected on 5 days (about 1.0 inches), against a normal of 4 days and 0.7 inches. The warmest day looks like 19 October (59.2°), the coolest 31 October (15.2°).
45.2°/26.2°
Average high / low
+0.3°
Above normal
5 / 4
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
18 October – 27 October
50.7°
46.9°
+2.1°
28 October – 6 November
36.1°
40.2°
-2.3°
7 November – 16 November
at normal
35.8°
—
October records over 66 years
73.2°1 October 2010All-time high
-13.5°30 October 2019All-time low
Climate normals and records are computed from the nearest reference point — Halfway (10 mi).
Mon, 1959° / 25°0
59 °
Merna, Monday, 19 October
Mostly clear. High 59°, low 25°.
Pressure30.09 inHg
Wind5.2 mph SE
Humidity45%
Visibility6.2 mi
Dew point28°
Tue, 2054° / 27°0.07
54 °
Merna, Tuesday, 20 October
Light rain. High 54°, low 27°.
Pressure30.09 inHg
Wind5 mph SE
Humidity47%
Visibility6.2 mi
Dew point34°
Wed, 2154° / 36°0.06
54 °
Merna, Wednesday, 21 October
Light rain. High 54°, low 36°.
Pressure30.18 inHg
Wind6.4 mph SE
Humidity61%
Visibility6.2 mi
Dew point38°
Thu, 2253° / 36°0
53 °
Merna, Thursday, 22 October
Overcast. High 53°, low 36°.
Pressure30.09 inHg
Wind5.8 mph SE
Humidity73%
Visibility6.2 mi
Dew point40°
Fri, 2342° / 32°0.43
42 °
Merna, Friday, 23 October
Rain. High 42°, low 32°.
Pressure29.77 inHg
Wind7.7 mph W
Humidity72%
Visibility—
Dew point33°
Sat, 2442° / 28°0
42 °
Merna, Saturday, 24 October
Partly cloudy. High 42°, low 28°.
Pressure30.12 inHg
Wind6.9 mph NW
Humidity61%
Visibility—
Dew point25°
Sun, 2548° / 26°0
48 °
Merna, Sunday, 25 October
Partly cloudy. High 48°, low 26°.
Pressure30.18 inHg
Wind4.6 mph W
Humidity29%
Visibility—
Dew point11°
Mon, 2646° / 29°0
46 °
Merna, Monday, 26 October
Clear. High 46°, low 29°.
Pressure30.03 inHg
Wind4.4 mph NW
Humidity43%
Visibility—
Dew point20°
Tue, 2750° / 29°0
50 °
Merna, Tuesday, 27 October
Clear. High 50°, low 29°.
Pressure29.88 inHg
Wind6.4 mph SE
Humidity41%
Visibility—
Dew point20°
Wed, 2850° / 33°0.1
50 °
Merna, Wednesday, 28 October
Snow. High 50°, low 33°.
Pressure29.71 inHg
Wind15 mph S
Humidity47%
Visibility—
Dew point27°
Thu, 2937° / 21°0.34
37 °
Merna, Thursday, 29 October
Snow. High 37°, low 21°.
Pressure29.65 inHg
Wind20.6 mph W
Humidity69%
Visibility—
Dew point17°
Fri, 3029° / 18°0.01
29 °
Merna, Friday, 30 October
Light snow. High 29°, low 18°.
Pressure29.91 inHg
Wind9.5 mph W
Humidity57%
Visibility—
Dew point13°
Sat, 3127° / 15°0
27 °
Merna, Saturday, 31 October
Overcast. High 27°, low 15°.
Pressure30.24 inHg
Wind16 mph NW
Humidity62%
Visibility—
Dew point13°
Sun, 0133° / 19°0
33 °
Merna, Sunday, 1 November
Light snow. High 33°, low 19°.
Pressure30.18 inHg
Wind12 mph NW
Humidity71%
Visibility—
Dew point22°
Mon, 0240° / 22°0.02
40 °
Merna, Monday, 2 November
Light snow. High 40°, low 22°.
Pressure29.74 inHg
Wind9.5 mph W
Humidity50%
Visibility—
Dew point19°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 0340° / 18°0.03
40 °
Merna, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high40°
Average low18°
Average precipitation0.03 in
Chance of precipitation15%
Record high58° (1962)
Record low-14° (1967)
Wed, 0440° / 18°0.03
40 °
Merna, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high40°
Average low18°
Average precipitation0.03 in
Chance of precipitation17%
Record high55° (2020)
Record low-11° (2002)
Thu, 0539° / 19°0.04
39 °
Merna, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high39°
Average low19°
Average precipitation0.04 in
Chance of precipitation22%
Record high55° (1980)
Record low-14° (1961)
Fri, 0639° / 19°0.04
39 °
Merna, Friday, 6 November
Climate normal for this date — 60-year average.
Average high39°
Average low19°
Average precipitation0.04 in
Chance of precipitation27%
Record high54° (1999)
Record low-14° (2003)
Sat, 0739° / 18°0.06
39 °
Merna, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high39°
Average low18°
Average precipitation0.06 in
Chance of precipitation30%
Record high54° (1999)
Record low-20° (2003)
Sun, 0837° / 18°0.07
37 °
Merna, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high37°
Average low18°
Average precipitation0.07 in
Chance of precipitation40%
Record high54° (1999)
Record low-3° (2003)
Mon, 0937° / 17°0.05
37 °
Merna, Monday, 9 November
Climate normal for this date — 60-year average.
Average high37°
Average low17°
Average precipitation0.05 in
Chance of precipitation32%
Record high56° (2016)
Record low-9° (1960)
Tue, 1036° / 15°0.04
36 °
Merna, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high36°
Average low15°
Average precipitation0.04 in
Chance of precipitation33%
Record high53° (2016)
Record low-12° (1985)
Wed, 1135° / 15°0.04
35 °
Merna, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high35°
Average low15°
Average precipitation0.04 in
Chance of precipitation30%
Record high52° (1999)
Record low-13° (2000)
Thu, 1236° / 15°0.06
36 °
Merna, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high36°
Average low15°
Average precipitation0.06 in
Chance of precipitation18%
Record high56° (1999)
Record low-14° (2000)
Fri, 1335° / 16°0.05
35 °
Merna, Friday, 13 November
Climate normal for this date — 60-year average.
Average high35°
Average low16°
Average precipitation0.05 in
Chance of precipitation32%
Record high56° (1999)
Record low-13° (2000)
Sat, 1435° / 14°0.06
35 °
Merna, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high35°
Average low14°
Average precipitation0.06 in
Chance of precipitation27%
Record high56° (1999)
Record low-14° (2000)
Sun, 1535° / 11°0.02
35 °
Merna, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high35°
Average low11°
Average precipitation0.02 in
Chance of precipitation13%
Record high55° (1999)
Record low-17° (1964)
Mon, 1635° / 13°0.03
35 °
Merna, Monday, 16 November
Climate normal for this date — 60-year average.
Average high35°
Average low13°
Average precipitation0.03 in
Chance of precipitation22%
Record high51° (1999)
Record low-15° (1980)
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Merna, WY are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Merna, WY since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.