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Bryn Mawr-Skyway, WA vs Mercer Island, WA weather comparison

Bryn Mawr-Skyway

WA

Bryn Mawr-Skyway and Mercer Island have remarkably similar climates.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Bryn Mawr-Skyway, WA and Mercer Island, WA
Bryn Mawr-SkywayMetricMercer Island
147 daysSunny daysclear or partly cloudy skies147 days
52 inPrecipitationper year52 in
155 daysWet daysrain or snow per year155 days
6 inSnowfallper year6 in
3 daysHot daysabove 90 °F3 days
29 daysFreezing nightsat or below 32 °F29 days
79%Humidityaverage relative79%
54 °FAverage temperatureyear round54 °F

Monthly temperatures

Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.

Bryn Mawr-SkywayMercer Island

Daily highs

506070JanMarMayJulSepNovBryn Mawr-Skyway, Jan: 48 °FBryn Mawr-Skyway, Feb: 50 °FBryn Mawr-Skyway, Mar: 55 °FBryn Mawr-Skyway, Apr: 60 °FBryn Mawr-Skyway, May: 66 °FBryn Mawr-Skyway, Jun: 71 °FBryn Mawr-Skyway, Jul: 77 °FBryn Mawr-Skyway, Aug: 78 °FBryn Mawr-Skyway, Sep: 72 °FBryn Mawr-Skyway, Oct: 61 °FBryn Mawr-Skyway, Nov: 52 °FBryn Mawr-Skyway, Dec: 47 °FMercer Island, Jan: 48 °FMercer Island, Feb: 51 °FMercer Island, Mar: 55 °FMercer Island, Apr: 60 °FMercer Island, May: 66 °FMercer Island, Jun: 71 °FMercer Island, Jul: 77 °FMercer Island, Aug: 77 °FMercer Island, Sep: 72 °FMercer Island, Oct: 61 °FMercer Island, Nov: 53 °FMercer Island, Dec: 47 °F

Daily lows

4050JanMarMayJulSepNovBryn Mawr-Skyway, Jan: 37 °FBryn Mawr-Skyway, Feb: 37 °FBryn Mawr-Skyway, Mar: 40 °FBryn Mawr-Skyway, Apr: 43 °FBryn Mawr-Skyway, May: 49 °FBryn Mawr-Skyway, Jun: 54 °FBryn Mawr-Skyway, Jul: 57 °FBryn Mawr-Skyway, Aug: 57 °FBryn Mawr-Skyway, Sep: 53 °FBryn Mawr-Skyway, Oct: 46 °FBryn Mawr-Skyway, Nov: 40 °FBryn Mawr-Skyway, Dec: 37 °FMercer Island, Jan: 37 °FMercer Island, Feb: 37 °FMercer Island, Mar: 39 °FMercer Island, Apr: 43 °FMercer Island, May: 49 °FMercer Island, Jun: 54 °FMercer Island, Jul: 57 °FMercer Island, Aug: 58 °FMercer Island, Sep: 54 °FMercer Island, Oct: 46 °FMercer Island, Nov: 40 °FMercer Island, Dec: 37 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Bryn Mawr-Skyway high485055606671777872615247
Mercer Island high485155606671777772615347
Bryn Mawr-Skyway low373740434954575753464037
Mercer Island low373739434954575854464037

Monthly precipitation

Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.

Bryn Mawr-SkywayMercer Island
0.02.55.07.5JanMarMayJulSepNovBryn Mawr-Skyway, Jan: 6.9 inBryn Mawr-Skyway, Feb: 4.8 inBryn Mawr-Skyway, Mar: 5.5 inBryn Mawr-Skyway, Apr: 4.5 inBryn Mawr-Skyway, May: 3.0 inBryn Mawr-Skyway, Jun: 2.3 inBryn Mawr-Skyway, Jul: 1.0 inBryn Mawr-Skyway, Aug: 1.3 inBryn Mawr-Skyway, Sep: 2.6 inBryn Mawr-Skyway, Oct: 5.3 inBryn Mawr-Skyway, Nov: 7.6 inBryn Mawr-Skyway, Dec: 7.0 inMercer Island, Jan: 6.9 inMercer Island, Feb: 4.8 inMercer Island, Mar: 5.5 inMercer Island, Apr: 4.5 inMercer Island, May: 3.0 inMercer Island, Jun: 2.3 inMercer Island, Jul: 1.0 inMercer Island, Aug: 1.3 inMercer Island, Sep: 2.6 inMercer Island, Oct: 5.3 inMercer Island, Nov: 7.6 inMercer Island, Dec: 7.0 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Bryn Mawr-Skyway6.94.85.54.53.02.31.01.32.65.37.67.0
Mercer Island6.94.85.54.53.02.31.01.32.65.37.67.0

Monthly sunny days

Days each month with clear or partly cloudy skies, so compare the same month between cities.

Bryn Mawr-SkywayMercer Island
01020JanMarMayJulSepNovBryn Mawr-Skyway, Jan: 7 daysBryn Mawr-Skyway, Feb: 10 daysBryn Mawr-Skyway, Mar: 9 daysBryn Mawr-Skyway, Apr: 10 daysBryn Mawr-Skyway, May: 12 daysBryn Mawr-Skyway, Jun: 13 daysBryn Mawr-Skyway, Jul: 20 daysBryn Mawr-Skyway, Aug: 21 daysBryn Mawr-Skyway, Sep: 18 daysBryn Mawr-Skyway, Oct: 12 daysBryn Mawr-Skyway, Nov: 8 daysBryn Mawr-Skyway, Dec: 7 daysMercer Island, Jan: 7 daysMercer Island, Feb: 10 daysMercer Island, Mar: 9 daysMercer Island, Apr: 10 daysMercer Island, May: 12 daysMercer Island, Jun: 13 daysMercer Island, Jul: 20 daysMercer Island, Aug: 21 daysMercer Island, Sep: 18 daysMercer Island, Oct: 12 daysMercer Island, Nov: 8 daysMercer Island, Dec: 7 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Bryn Mawr-Skyway71091012132021181287
Mercer Island71091012132021181287

Keep comparing

Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.

Bryn Mawr-Skyway vs another city

See the full Bryn Mawr-Skyway, WA climate profile

More Washington cities

Mercer Island vs another city

See the full Mercer Island, WA climate profile

More Washington cities

About this data

Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).