Washington: Today - Sunny, high near 90, low near 70. The chance of rain is 10 per cent through tonight. Friday - Sunny, high near 90.

Maryland and Virginia: Today - Sunny, highs from the low 80s to near 90, lows from the 60s to the mid 70s. Friday - Sunny, highs from the low 80s to near 90.

Lower Potomac and Chesapeake Bay: Today - Fair with visibility of more than 5 miles. Wind will be from the southwest at near 10 knots today, but from the south at less than 15 knots tonight. Waves in unprotected waters will be less than 1 foot.

Atlantic Ocean Beaches from Cape May to Cape Hatteras: Today and Friday - Sunny, highs from the mid 80s to near 90. Water temperatures will range from the low 70s in the north, to near 80 in the south.

Extended Area Forecast for Saturday through Monday - Fair through the period. Highs will be from the mid 80s to the low 90s, lows from the mid 60s to the mid 70s. Normal Washington temperatures for the period are a high of 80 and a low of 69.

West Virginia: Today - Partly cloudy, highs from near 80 to the low 90s, lows from the mid 50s to the mid 60s. Friday: Partly cloudy, chance of thundershowers in the mountains, highs from near 60 to the low 90s.

The National Weather Forecast for today - Showers and thunderstorms will be scattered over the northern Rockies, over the northern and central plains, the upper Mississippi Valley, upper and lower Great Lakes and over north Atlantic Coast. There will also be scattered showers and thunderstorms on the Gulf Coast and through south Atlantic Coast. Isolated showers are likely over the middle Atlantic Coast, the Ohio Valley, the middle and lower Mississippi Valley, the southern Plains and over northern Rocky Mountains. Temperatures will be seasonably mild over the northern Rockies and portions of the northern Plains and upper Mississippi Valley. The remainder of the nation will be warm to hot.

ALMANAC DATA FOR Aug. 4, Sun rises 6:11 a.m., sets 8:16 p.m., moon rises 11:13 p.m., sets 11:41 a.m. Tides: High 12:33 p.m., low 7:06 a.m. and 7:23 p.m. High and low tides at the following locations can be obtained by subtracting the hourse indicated from the tides above. Annapolis (3 1/2); Bloody Point Lighthouse (4 1/2); Deale, Md. (4 1/2); Colonial Beach (6); Norfolk (1 1/2); Virginia Beach (1); Solomons Island (6 1/2); Point Lookout (7). Pollen count: 5 English Plaintain (note: more than 7 or higher is considered undesirable.)

The Council of Government's Air Quality Index for yesterday showed the high reading in the Washington area during the 2 p.m. to 3 p.m. period was 46 for the pollutant, photochemical oxidants. Index values between 25 and 49 indicate fair air quality. When the index exceeds 100 the air becomes hazardous and persons with lung, heart and eye problems should restrict their activity. The forecast for today indicates the air quality will improve.

The National Weather Service forecasts that the Potomac River stage at Little Falls will be near 2.7 feet.

Washington data at 8 p.m. (EDT) yesterday: Highest temperature since 8 a.m. yesterday, 87 degrees at 3:35 a.m. Lowest temperature since midnight, 73 degrees at 5:35 p.m. Excess of temperature since Jan. 1, 276 degrees. Record high temperature for today, 102 degrees in 1930. Record low temperature for today, 54 degrees in 1912. Relative humidity: Maximum, 88 per cent at 10 a.m.; Minimum, 65 per cent at 3 p.m. Excess of precipitation since August 1, 63 inches. Deficiency of precipitation since Jan. 1, 5:85 inches. Highest observed wind since 8 a.m. 14 miles per hour from the southwest at 4 p.m. Peak gust since 8 p.m., 24 miles per hour from the southsouthwest at 4:01 p.m. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. D 12 midn.(COLUMN)77(COLUMN)64 1 a.m.(COLUMN)76(COLUMN)64 2 a.m.(COLUMN)76(COLUMN)66 3 a.m.(COLUMN)75(COLUMN)69 4 a.m.(COLUMN)75(COLUMN)69 5 a.m.(COLUMN)74(COLUMN)76 6 a.m.(COLUMN)74(COLUMN)79 7 a.m.(COLUMN)74(COLUMN)82 8 a.m.(COLUMN)75(COLUMN)82 9 a.m.(COLUMN)76(COLUMN)85 10 a.m.(COLUMN)76(COLUMN)88 11 a.m.(COLUMN)76(COLUMN)88 12 noon(COLUMN)79(COLUMN)79 1 p.m.(COLUMN)79(COLUMN)79 2 p.m.(COLUMN)80(COLUMN)77 3 p.m.(COLUMN)85(COLUMN)65 4 p.m.(COLUMN)85(COLUMN)65 5 p.m.(COLUMN)84(COLUMN)65 6 p.m.(COLUMN)84(COLUMN)65 7 p.m.(COLUMN)82(COLUMN)72 (END TABLE) Temperatures ending 8 a.m. (EDT) Yesterday(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)82(COLUMN)56 Albuquerque(COLUMN)96(COLUMN)66 Amarillo(COLUMN)90(COLUMN)64 Anchorage(COLUMN)64(COLUMN)57 Asheville(COLUMN)81(COLUMN)65 Atlanta(COLUMN)83(COLUMN)67 Atlantic City(COLUMN)87(COLUMN)74 Austin(COLUMN)100(COLUMN)76 Baltimore(COLUMN)88(COLUMN)72 Billings(COLUMN)90(COLUMN)59 Birmingham(COLUMN)91(COLUMN)71 Bismarck(COLUMN)80(COLUMN)50 Boise(COLUMN)97(COLUMN)71 Boston(COLUMN)88(COLUMN)68 Brownsville(COLUMN)100(COLUMN)76 Buffalo(COLUMN)80(COLUMN)61 Burlington(COLUMN)81(COLUMN)58 Casper(COLUMN)91(COLUMN)56 Charleston, S.C.(COLUMN)88(COLUMN)76 Charleston, W.V.(COLUMN)83(COLUMN)65 Charlotte(COLUMN)86(COLUMN)68 Cheyenne(COLUMN)82(COLUMN)56 Chicago(COLUMN)78(COLUMN)[WORD ILLEGIBLE] Cincinnati(COLUMN)83(COLUMN)59 Cleveland(COLUMN)[WORD ILLEGIBLE](COLUMN)59 Columbia, S.C.(COLUMN)80(COLUMN)68 Columbus(COLUMN)82(COLUMN)58 Dal-Ft. Worth(COLUMN)94(COLUMN)72 Dayton(COLUMN)83(COLUMN)62 Denver(COLUMN)88(COLUMN)61 Des Moines(COLUMN)90(COLUMN)65 Detroit(COLUMN)86(COLUMN)59 Duluth(COLUMN)71(COLUMN)56 El Paso(COLUMN)101(COLUMN)70 Fairbanks(COLUMN)15(COLUMN)56 Fargo(COLUMN)80(COLUMN)55 Flagstaff(COLUMN)89(COLUMN)52 Great Falls(COLUMN)87(COLUMN)55 Hartford(COLUMN)86(COLUMN)62 Helena(COLUMN)91(COLUMN)53 Honolulu(COLUMN)98(COLUMN)76 Houston(COLUMN)88(COLUMN)30 Indianapolis(COLUMN)84(COLUMN)61 Jackson, Miss.(COLUMN)Jackson, Miss.(COLUMN)70 Jacksonville(COLUMN)94(COLUMN)74 Juneau(COLUMN)70(COLUMN)45 Kansas City(COLUMN)91(COLUMN)63 Las Vegas(COLUMN)115(COLUMN)81 Little Rock(COLUMN)86(COLUMN)69 Los Angeles(COLUMN)89(COLUMN)72 Louisville(COLUMN)55(COLUMN)65 Memphis(COLUMN)88(COLUMN)67 Miami Beach(COLUMN)86(COLUMN)79 Midland-[WORD ILLEGIBLE]$69(COLUMN)71 Milwaukee(COLUMN)75(COLUMN)63 Mpls.-St. Paul(COLUMN)77(COLUMN)62 Nashville(COLUMN)87(COLUMN)64 New Orleans(COLUMN)92(COLUMN)75 New York(COLUMN)87(COLUMN)72 Norfolk(COLUMN)87(COLUMN)73 North Platte(COLUMN)87(COLUMN)59 Oklahoma City(COLUMN)93(COLUMN)70 Omaha(COLUMN)33(COLUMN)68 Orlando(COLUMN)92(COLUMN)76 Philadelphia(COLUMN)35(COLUMN)69 Phoenix(COLUMN)108(COLUMN)87 Pittsburgh(COLUMN)78(COLUMN)53 Portland, Maine(COLUMN)80(COLUMN)69 Portland, Ore.(COLUMN)94(COLUMN)69 Providence(COLUMN)86(COLUMN)68 Raleigh(COLUMN)86(COLUMN)68 Rapid City(COLUMN)87(COLUMN)57 Reno(COLUMN)98(COLUMN)89 Richmond(COLUMN)88(COLUMN)71 St. Louis(COLUMN)82(COLUMN)70 St. Prbg-Tampa(COLUMN)91(COLUMN)79 Salt Lake City(COLUMN)101(COLUMN)79 San Antonio(COLUMN)97(COLUMN)74 San Diego(COLUMN)81(COLUMN)79 San Francisco(COLUMN)68(COLUMN)57 San Juan(COLUMN)85(COLUMN)74 St. Ste. Marie(COLUMN)66(COLUMN)$68 Seattle(COLUMN)89(COLUMN)53 Shreveport(COLUMN)80(COLUMN)66 Sioux Falls(COLUMN)87(COLUMN)[WORD ILLEGIBLE] Spokane(COLUMN)86(COLUMN)[WORD ILLEGIBLE] Syracuse(COLUMN)80(COLUMN)58 Topeka(COLUMN)92(COLUMN)69 Tucson(COLUMN)101(COLUMN)77 Tulsa(COLUMN)95(COLUMN)73 Washington(COLUMN)86(COLUMN)73 Wichita(COLUMN)90(COLUMN)71(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)59 Amsterdam(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)70 Ankara(COLUMN)clear(COLUMN) 3 p.m.(COLUMN)97 Athens(COLUMN)clear(COLUMN) 2 p.m.(COLUMN)86 Auckland(COLUMN)clear(COLUMN)m-night(COLUMN)41 Berlin(COLUMN)rain 1 p.m.(COLUMN)63 Birmingham(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)63 Brussels(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)72 Cairo(COLUMN)clear(COLUMN) 2 p.m.(COLUMN)97 Casabianca(COLUMN)pt. cldy(COLUMN)noon(COLUMN)70 Copenhagen(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)64 Dublin(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)64 Geneva(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)70 Hong Kong(COLUMN)cloudy(COLUMN) 8 p.m.(COLUMN)79 Lisbon(COLUMN)clear(COLUMN)noon(COLUMN)70 London(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)72 Madrid(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)75 Malta(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)81 Manila(COLUMN) 8 p.m.(COLUMN)84 Moscow(COLUMN)clear(COLUMN) 3 p.m.(COLUMN)89 New Delhi(COLUMN)rain(COLUMN) 5 p.m.(COLUMN)84 Nice(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)75 Oslo(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)77 Paris(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)75 Peking(COLUMN)pt. cldy(COLUMN) 8 p.m.(COLUMN)75 Rome(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)77 Saigon(COLUMN)rain(COLUMN) 8 p.m.(COLUMN)79 Sofia(COLUMN)clear(COLUMN) 2 p.m.(COLUMN)73 Stockholm(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)59 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)59 Tel. Aviv(COLUMN)clear(COLUMN) 2 p.m.(COLUMN)[WORD ILLEGIBLE] Tokyo(COLUMN)cloudy(COLUMN) 9 p.m.(COLUMN)84 Tunis(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)85 Vienna(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)72 Warsaw(COLUMN)pt. cloudy(COLUMN) 1 p.m.(COLUMN)72(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)cloudy(COLUMN)91(COLUMN)76 Bermuda(COLUMN)fair(COLUMN)86(COLUMN)81 Calgany(COLUMN)rain(COLUMN)77(COLUMN)52 Cufiacan(COLUMN)pt. cldy(COLUMN)100(COLUMN)81 Edmonton(COLUMN)clear(COLUMN)73(COLUMN)50 Havana(COLUMN)pt. cldy(COLUMN)91(COLUMN)77 Kingston(COLUMN)pt. cldy(COLUMN)91(COLUMN)79 Montego Bay(COLUMN)cloudy(COLUMN)90(COLUMN)76 Mexico City(COLUMN)pt. sunny(COLUMN)79(COLUMN)50 Monterrey(COLUMN)fair(COLUMN)102(COLUMN)76 Montreal(COLUMN)cloudy(COLUMN)79(COLUMN)63 Nassau(COLUMN)pt. cldy(COLUMN)69(COLUMN)79 Ottawa(COLUMN)rain(COLUMN)81(COLUMN)69 Regina(COLUMN)pt. cldy(COLUMN)72(COLUMN)46 St. Thomas(COLUMN)cloudy(COLUMN)90(COLUMN)79 Vancouver(COLUMN)clear(COLUMN)79(COLUMN)63 Veracruz(COLUMN)pt. cldy(COLUMN)89(COLUMN)76 Winnipeg(COLUMN)clear(COLUMN)75(COLUMN)48(END TABLE)