Monthly outlook for Merna, WY: average high 46.9°, average low 31.6°. That is 0.6° above the climate normal for October. Precipitation is expected on 5 days (about 1.7 inches), against a normal of 4 days and 0.7 inches. The warmest day looks like 17 October (58°), the coolest 16 October (24.9°).
46.9°/31.6°
Average high / low
+0.6°
Above normal
5 / 4
Wet days / normal
1.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
50.3°
47.9°
+1.3°
26 October – 4 November
41.4°
41.4°
+0°
5 November – 14 November
at normal
36.7°
—
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).
Sat, 1758° / 27°0
58 °
Merna, Saturday, 17 October
Clear. High 58°, low 27°.
Pressure30.30 inHg
Wind0.9 mph E
Humidity38%
Visibility6.2 mi
Dew point24°
Sun, 1857° / 35°0
57 °
Merna, Sunday, 18 October
Clear. High 57°, low 35°.
Pressure30.09 inHg
Wind2.1 mph SE
Humidity40%
Visibility6.2 mi
Dew point21°
Mon, 1953° / 34°0
53 °
Merna, Monday, 19 October
Clear. High 53°, low 34°.
Pressure30.00 inHg
Wind4.5 mph SE
Humidity45%
Visibility6.2 mi
Dew point24°
Tue, 2051° / 37°0.02
51 °
Merna, Tuesday, 20 October
Light rain. High 51°, low 37°.
Pressure30.00 inHg
Wind4.5 mph SE
Humidity47%
Visibility—
Dew point30°
Wed, 2154° / 38°0
54 °
Merna, Wednesday, 21 October
Clear. High 54°, low 38°.
Pressure30.12 inHg
Wind9.6 mph SE
Humidity58%
Visibility—
Dew point34°
Thu, 2253° / 38°0.41
53 °
Merna, Thursday, 22 October
Rain. High 53°, low 38°.
Pressure29.94 inHg
Wind16.9 mph SE
Humidity55%
Visibility—
Dew point35°
Fri, 2341° / 36°0.57
41 °
Merna, Friday, 23 October
Rain. High 41°, low 36°.
Pressure29.83 inHg
Wind12.4 mph W
Humidity82%
Visibility—
Dew point34°
Sat, 2442° / 33°0
42 °
Merna, Saturday, 24 October
Overcast. High 42°, low 33°.
Pressure30.06 inHg
Wind7.1 mph SE
Humidity73%
Visibility—
Dew point30°
Sun, 2541° / 28°0
41 °
Merna, Sunday, 25 October
Light snow. High 41°, low 28°.
Pressure30.03 inHg
Wind6.1 mph W
Humidity64%
Visibility—
Dew point27°
Mon, 2640° / 31°0
40 °
Merna, Monday, 26 October
Overcast. High 40°, low 31°.
Pressure30.00 inHg
Wind8.2 mph SE
Humidity67%
Visibility—
Dew point27°
Tue, 2746° / 29°0.01
46 °
Merna, Tuesday, 27 October
Light rain. High 46°, low 29°.
Pressure29.77 inHg
Wind9.6 mph SE
Humidity60%
Visibility—
Dew point28°
Wed, 2840° / 32°0.22
40 °
Merna, Wednesday, 28 October
Snow. High 40°, low 32°.
Pressure29.85 inHg
Wind12.9 mph NW
Humidity66%
Visibility—
Dew point28°
Thu, 2939° / 30°0.27
39 °
Merna, Thursday, 29 October
Snow. High 39°, low 30°.
Pressure29.91 inHg
Wind5.4 mph E
Humidity92%
Visibility—
Dew point32°
Fri, 3042° / 27°0.17
42 °
Merna, Friday, 30 October
Snow. High 42°, low 27°.
Pressure29.97 inHg
Wind11.9 mph N
Humidity74%
Visibility—
Dew point28°
Sat, 3140° / 26°0
40 °
Merna, Saturday, 31 October
Overcast. High 40°, low 26°.
Pressure30.06 inHg
Wind4.8 mph NW
Humidity68%
Visibility—
Dew point26°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0140° / 20°0.04
40 °
Merna, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high40°
Average low20°
Average precipitation0.04 in
Chance of precipitation25%
Record high57° (1988)
Record low-13° (2002)
Mon, 0239° / 19°0.06
39 °
Merna, Monday, 2 November
Climate normal for this date — 60-year average.
Average high39°
Average low19°
Average precipitation0.06 in
Chance of precipitation25%
Record high56° (1962)
Record low-15° (1973)
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)
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.