Monthly outlook for Martha Lake, WA: average high 74.5°, average low 53°. That is 1.6° above the climate normal for August. Precipitation is expected on 4 days (about 1.5 inches), against a normal of 3 days and 0.8 inches. The warmest day looks like 15 August (83°), the coolest 11 August (48.6°).
74.5°/53°
Average high / low
+1.6°
Above normal
4 / 3
Wet days / normal
1.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
76.9°
72.5°
+2.5°
19 August – 28 August
70.6°
70.5°
+0°
29 August – 7 September
at normal
68.5°
—
August records over 66 years
93.6°16 August 2020All-time high
44.1°29 August 1969All-time low
Climate normals and records are computed from the nearest reference point — Lake Stickney (2 mi).
Mon, 1077° / 51°0
77 °
Martha Lake, Monday, 10 August
Partly cloudy. High 77°, low 51°.
Pressure30.06 inHg
Wind3.1 mph SW
Humidity42%
Visibility6.2 mi
Dew point51°
Tue, 1178° / 49°0
78 °
Martha Lake, Tuesday, 11 August
Clear. High 78°, low 49°.
Pressure30.09 inHg
Wind4.4 mph N
Humidity40%
Visibility6.2 mi
Dew point50°
Wed, 1277° / 50°0
77 °
Martha Lake, Wednesday, 12 August
Clear. High 77°, low 50°.
Pressure30.00 inHg
Wind4.5 mph NW
Humidity43%
Visibility6.2 mi
Dew point52°
Thu, 1379° / 51°0
79 °
Martha Lake, Thursday, 13 August
Clear. High 79°, low 51°.
Pressure29.85 inHg
Wind8.1 mph NW
Humidity38%
Visibility—
Dew point49°
Fri, 1482° / 53°0
82 °
Martha Lake, Friday, 14 August
Overcast. High 82°, low 53°.
Pressure29.91 inHg
Wind7.5 mph NW
Humidity37%
Visibility—
Dew point50°
Sat, 1583° / 54°0
83 °
Martha Lake, Saturday, 15 August
Overcast. High 83°, low 54°.
Pressure29.94 inHg
Wind8.5 mph NW
Humidity31%
Visibility—
Dew point47°
Sun, 1681° / 52°0
81 °
Martha Lake, Sunday, 16 August
Overcast. High 81°, low 52°.
Pressure29.94 inHg
Wind7.2 mph NW
Humidity28%
Visibility—
Dew point42°
Mon, 1760° / 56°0.26
60 °
Martha Lake, Monday, 17 August
Light rain. High 60°, low 56°.
Pressure30.00 inHg
Wind8.9 mph S
Humidity93%
Visibility—
Dew point57°
Tue, 1877° / 55°0
77 °
Martha Lake, Tuesday, 18 August
Overcast. High 77°, low 55°.
Pressure29.97 inHg
Wind8.7 mph NW
Humidity40%
Visibility—
Dew point48°
Wed, 1979° / 51°0
79 °
Martha Lake, Wednesday, 19 August
Overcast. High 79°, low 51°.
Pressure29.97 inHg
Wind4 mph W
Humidity47%
Visibility—
Dew point50°
Thu, 2078° / 59°0.07
78 °
Martha Lake, Thursday, 20 August
Light rain. High 78°, low 59°.
Pressure29.91 inHg
Wind7.2 mph NW
Humidity46%
Visibility—
Dew point53°
Fri, 2174° / 56°0.03
74 °
Martha Lake, Friday, 21 August
Light rain. High 74°, low 56°.
Pressure29.91 inHg
Wind5.8 mph SW
Humidity42%
Visibility—
Dew point48°
Sat, 2266° / 56°0.46
66 °
Martha Lake, Saturday, 22 August
Light rain. High 66°, low 56°.
Pressure30.03 inHg
Wind4.1 mph N
Humidity85%
Visibility—
Dew point58°
Sun, 2369° / 53°0.02
69 °
Martha Lake, Sunday, 23 August
Light rain. High 69°, low 53°.
Pressure30.06 inHg
Wind7.3 mph N
Humidity53%
Visibility—
Dew point50°
Mon, 2457° / 52°0.62
57 °
Martha Lake, Monday, 24 August
Rain. High 57°, low 52°.
Pressure29.88 inHg
Wind6.8 mph SE
Humidity96%
Visibility—
Dew point55°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2571° / 53°0.07
71 °
Martha Lake, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high71°
Average low53°
Average precipitation0.07 in
Chance of precipitation20%
Record high83° (2025)
Record low46° (1993)
Wed, 2671° / 54°0.05
71 °
Martha Lake, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high71°
Average low54°
Average precipitation0.05 in
Chance of precipitation18%
Record high83° (1986)
Record low46° (1993)
Thu, 2771° / 54°0.1
71 °
Martha Lake, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high71°
Average low54°
Average precipitation0.1 in
Chance of precipitation28%
Record high85° (1986)
Record low47° (1995)
Fri, 2870° / 54°0.05
70 °
Martha Lake, Friday, 28 August
Climate normal for this date — 60-year average.
Average high70°
Average low54°
Average precipitation0.05 in
Chance of precipitation27%
Record high85° (1967)
Record low47° (2000)
Sat, 2970° / 54°0.11
70 °
Martha Lake, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high70°
Average low54°
Average precipitation0.11 in
Chance of precipitation32%
Record high87° (2017)
Record low44° (1969)
Sun, 3069° / 54°0.07
69 °
Martha Lake, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high69°
Average low54°
Average precipitation0.07 in
Chance of precipitation40%
Record high81° (1987)
Record low46° (1964)
Mon, 3168° / 54°0.07
68 °
Martha Lake, Monday, 31 August
Climate normal for this date — 60-year average.
Average high68°
Average low54°
Average precipitation0.07 in
Chance of precipitation32%
Record high86° (1987)
Record low44° (1964)
Tue, 0168° / 53°0.11
68 °
Martha Lake, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high68°
Average low53°
Average precipitation0.11 in
Chance of precipitation30%
Record high83° (1974)
Record low44° (1973)
Wed, 0269° / 53°0.09
69 °
Martha Lake, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high69°
Average low53°
Average precipitation0.09 in
Chance of precipitation30%
Record high86° (1988)
Record low44° (1960)
Thu, 0369° / 53°0.08
69 °
Martha Lake, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high69°
Average low53°
Average precipitation0.08 in
Chance of precipitation25%
Record high87° (1988)
Record low46° (1975)
Fri, 0468° / 53°0.07
68 °
Martha Lake, Friday, 4 September
Climate normal for this date — 60-year average.
Average high68°
Average low53°
Average precipitation0.07 in
Chance of precipitation25%
Record high82° (1988)
Record low45° (1965)
Sat, 0568° / 53°0.09
68 °
Martha Lake, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high68°
Average low53°
Average precipitation0.09 in
Chance of precipitation30%
Record high94° (2017)
Record low45° (2002)
Sun, 0668° / 52°0.12
68 °
Martha Lake, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high68°
Average low52°
Average precipitation0.12 in
Chance of precipitation28%
Record high84° (2017)
Record low44° (1969)
Mon, 0768° / 52°0.07
68 °
Martha Lake, Monday, 7 September
Climate normal for this date — 60-year average.
Average high68°
Average low52°
Average precipitation0.07 in
Chance of precipitation32%
Record high82° (1981)
Record low44° (1992)
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 Martha Lake, WA 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 Martha Lake, WA 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.