Washington: Today - Sunny and hot, high 90 to 94, low 67 to 74. Chance of rain is near zero through tonight. Winds will be light and variable. Saturday - Sunny, high 92 to 96.

Maryland and Virginia: Today - Sunny, high in the mid 80s in the mountains and mid 90s elsewhere Saturday - Partly cloudy, high in 90s.

Lower Potomac and Chesapeake Bay: Today - Fair, visibility more than five miles. Winds will be light and variable at 10 knots. Waves in unprotected waters will be one foot.

Atlantic Ocean Beaches from New Jersey to North Carolina: Today and Saturday will be sunny hot and humid, highs in lower 90s. Water temperatures will be 70 to 75 in north and 75 to 80 in the south.

Extended Area Outlook for Sunday through Tuesday: Intervals of cloudiness should prevail through the period with a chance of showers on Sunday.Highs will average in the 80s Sunday and 75 to 85 Monday and Tuesday. Lows will average in the 60s. Normal Washington temperatures for the period will be high of 86 and a low of 67.

The National Weather Forecast for today: Most of the rainfall will be in the northern portions of the nation. Scattered showers will reach from northern California and the Pacific Northwest across the northern Rockies and North Dakota. There will be a chance of scattered thundershowers in Nebraska and they will be scattered over the mid and the upper Mississippi Valley and also over the Gulf Coast states. Cool or mild weather will remain over the northern half of the Rockies across most of the intermountain region to the northern half of the Pacific coast. It will turn cooler over the Dakotas but stay hot over Arkansas. Oklahoma and Louisiana and also from the north and mid Atlantic Coast states through the Great Lakes region. The remainder of the country will be seasonably warm.

The Nation Yesterday: A few snow showers were still falling in the morning in Glacier National park in Montana and also in the west Yellowstone area. Logan Pass in Glacier National park had three and a half inches of slushy snow on the road. A heavy snow warning the stockmans advisory for the northwestern Wyoming mountains was cancelled. The cool air continued to move south and east over the central Rockies and the northern Plains. Temperatures were still in the 50s in Wyoming and Colorado before noon. Minimums tonight will drop into the 30s over the mountains of Colorado and Wyoming. A return to mild temperatures this weekend in expected in Montana. Elsewhere, summer is still in style, hot and humid weather continued over much of the midwest and in the east ahead of cold fronts. Temperatures above the 100 degree mark were already seen in Kansas and Oklahoma, and northern New England had 90s. Portland, Me. had a high of 92 degrees today to set a new daily record, the old record was 90 set in 1959. A cold front pushing eastward was expected to lower temperatures somewhat. There was very little precipitation in the nation in addition to that recorded over the northern Rockies. By late morning a few showers dampened northeastern New York and northern Vermont. Isolated thundershowers lingered over northern Missouri and central Illinois. The largest area of rain was over the southeast, where scattered thundershowers stretched over Florida into Georgia and extreme Alabama and Mississippi.

Almanac Data for today: The sun rises 6:24 a.m., sets 7:59 p.m.; moon rises 8:07 p.m., sets 6:34 a.m. Tides: high 8:36 a.m. and 9.08 p.m., low 2:52 a.m. and 3:25 p.m. High and low tides at the following locations may be obtained by subtracting the hours indicated from the hours above: Annapolis (3 1/2), Bloody Paint Lighthouse (4 1/2), Deale, Md. (4 1/2), Colonial Beach (5 1/4), Norfolk (1), Virginia Beach (3/4), Solomons Island (6 1/4), Point Lookout (7).

Pollen Count: 7 Ragweed (a reading of more than 7 is considered to be undesirable).

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 2 to 3 p.m. period was 55 for the pollutant, photochemical oxidants. Index values between 50 and 99 indicate unhealthy air quality. When the index exceeds 100 the air is considered very unhealthy and individuals with lung, heart and eye ailments are urged to restrict their activity. The forecast for today indicates that the air quality will improve.

The National Weather Service forecasts the Potomac River Stage at Little Falls should remain at 4.4 feet today. Local Temps., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnite(COLUMN)82(COLUMN)85 1 a.m.(COLUMN)82(COLUMN)85 2 a.m.(COLUMN)81(COLUMN)88 3 a.m.(COLUMN)80(COLUMN)91 4 a.m.(COLUMN)79(COLUMN)94 5 a.m.(COLUMN)79(COLUMN)94 6 a.m.(COLUMN)78(COLUMN)97 7 a.m.(COLUMN)78(COLUMN)97 8 a.m.(COLUMN)82(COLUMN)85 9 a.m.(COLUMN)86(COLUMN)70 10 a.m.(COLUMN)87(COLUMN)68 11 a.m.(COLUMN)89(COLUMN)60 12 noon(COLUMN)90(COLUMN)60 1 p.m.(COLUMN)89(COLUMN)58 2 p.m.(COLUMN)91(COLUMN)54 3 p.m.(COLUMN)92(COLUMN)47 4 p.m.(COLUMN)93(COLUMN)46 5 p.m.(COLUMN)92(COLUMN)46 6 p.m.(COLUMN)91(COLUMN)46 7 p.m.(COLUMN)89(COLUMN)50(END TABLE) Temperatures ending 8 a.m. (EDT) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)89(COLUMN)70 Albuquerque(COLUMN)96(COLUMN)66 Amarillo(COLUMN)99(COLUMN)72 Anchorage(COLUMN)61(COLUMN)52 Asheville(COLUMN)82(COLUMN)66 Atlanta(COLUMN)89(COLUMN)72 Atlantic City(COLUMN)79(COLUMN)75 Austin(COLUMN)97(COLUMN)78 Baltimore(COLUMN)91(COLUMN)73 Billings(COLUMN)73(COLUMN)48 Birmingham(COLUMN)91(COLUMN)70 B ismarck(COLUMN)87(COLUMN)58 Boise(COLUMN)70(COLUMN)40 Boston(COLUMN)88(COLUMN)75 Brownsville(COLUMN)97(COLUMN)77 Buffalo(COLUMN)87(COLUMN)70 Burlington(COLUMN)87(COLUMN)70 Casper(COLUMN)85(COLUMN)50 Charleston, S.C.(COLUMN)92(COLUMN)79 Charleston, W.Va.(COLUMN)87(COLUMN)73 Charlotte(COLUMN)91(COLUMN)72 Cheyenne(COLUMN)84(COLUMN)49 Chicago(COLUMN)83(COLUMN)66 Cleveland(COLUMN)89(COLUMN)61 Columbia, S.C.(COLUMN)94(COLUMN)72 Columbus(COLUMN)86(COLUMN)63 Dal.-Ft. Worth(COLUMN)101(COLUMN)77 Dayton(COLUMN)85(COLUMN)61 Denver(COLUMN)93(COLUMN)53 Des Moines(COLUMN)89(COLUMN)70 Detroit(COLUMN)86(COLUMN)49 Duluth(COLUMN)71(COLUMN)54 El Paso(COLUMN)99(COLUMN)78 Fairbanks(COLUMN)70(COLUMN)55 Fargo(COLUMN)82(COLUMN)68 Flagstaff(COLUMN)80(COLUMN)56 Great Falls(COLUMN)72(COLUMN)43 Hartford(COLUMN)84(COLUMN)72 Helena(COLUMN)68(COLUMN)47 Honolulu(COLUMN)89(COLUMN)73 Houston(COLUMN)54(COLUMN)68 Indianapolis(COLUMN)85(COLUMN)63 Jackson, Miss.(COLUMN)94(COLUMN)74 Jacksonville(COLUMN)93(COLUMN)75 Juneau(COLUMN)71(COLUMN)51 Kansas City(COLUMN)88(COLUMN)70 Las Vegas(COLUMN)100(COLUMN)78 Little Rock(COLUMN)100(COLUMN)76 Los Angeles(COLUMN)82(COLUMN)59 Louisville(COLUMN)90(COLUMN)70 Memphis(COLUMN)93(COLUMN)81 Miami Beach(COLUMN)87(COLUMN)82 Midland-Odessa(COLUMN)98(COLUMN)74 Milwaukee(COLUMN)82(COLUMN)61 Mpls.-St. Paul(COLUMN)85(COLUMN)69 Nashville(COLUMN)94(COLUMN)72 New Orleans(COLUMN)93(COLUMN)75 New York(COLUMN)87(COLUMN)79 Norfolk(COLUMN)93(COLUMN)78 North Platte(COLUMN)92(COLUMN)58 Oklahoma City(COLUMN)101(COLUMN)80 Omaha(COLUMN)86(COLUMN)69 Orlando(COLUMN)94(COLUMN)74 Philadelphia(COLUMN)92(COLUMN)80 Phoenix(COLUMN)107(COLUMN)81 Pittsburgh(COLUMN)84(COLUMN)64 Portland, Me.(COLUMN)87(COLUMN)68 Portland, Ore.(COLUMN)66(COLUMN)56 Providence(COLUMN)84(COLUMN)75 Raleigh(COLUMN)93(COLUMN)74 Rapid City(COLUMN)91(COLUMN)59 Reno(COLUMN)80(COLUMN)43 Richmond(COLUMN)95(COLUMN)74 St. Louis(COLUMN)88(COLUMN)64 St. Prbg.-Tampa(COLUMN)92(COLUMN)77 Salt Lake City(COLUMN)85(COLUMN)57 San Antonio(COLUMN)94(COLUMN)76 San Diego(COLUMN)77(COLUMN)66 San Francisco(COLUMN)63(COLUMN)56 San Juan(COLUMN)85(COLUMN)75 St. Ste. Marie(COLUMN)76(COLUMN)55 Seattle(COLUMN)71(COLUMN)54 Shreveport(COLUMN)101(COLUMN)74 Sioux Falls(COLUMN)83(COLUMN)63 Spokane(COLUMN)56(COLUMN)50 Syracuse(COLUMN)88(COLUMN)72 Topeka(COLUMN)89(COLUMN)69 Tucson(COLUMN)101(COLUMN)76 Tulsa(COLUMN)105(COLUMN)87 Washington(COLUMN)93(COLUMN)78 Wichita(COLUMN)100(COLUMN)80(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)pt. cldy.(COLUMN)90(COLUMN)80 Barbados(COLUMN)pt. clyd.(COLUMN)86(COLUMN)77 Bermuda(COLUMN)fair(COLUMN)86(COLUMN)81 Bogota(COLUMN)fair(COLUMN)63(COLUMN)38 Calgary(COLUMN)rain(COLUMN)52(COLUMN)46 Edmonton(COLUMN)cloudy(COLUMN)54(COLUMN)48 Havana(COLUMN)pt. cldy.(COLUMN)90(COLUMN)75 Kingston(COLUMN)fair(COLUMN)92(COLUMN)79 Montego Bay(COLUMN)fair(COLUMN)88(COLUMN)75 Mexico City(COLUMN)haza(COLUMN)79(COLUMN)56 Monterrey(COLUMN)sunny(COLUMN)101(COLUMN)74 Montreal(COLUMN)pt. clyd.(COLUMN)86(COLUMN)68 Nassau(COLUMN)pt. cldy.(COLUMN)90(COLUMN)72 Ottawa(COLUMN)clear(COLUMN)84(COLUMN)68 Regina(COLUMN)cloudy(COLUMN)77(COLUMN)54 St. Kitts(COLUMN)fair(COLUMN)85(COLUMN)72 St. Thomas(COLUMN)pt. clyd.(COLUMN)83(COLUMN)74 Toronto(COLUMN)cloudy(COLUMN)86(COLUMN)68 Vancouver(COLUMN)Clear(COLUMN)66(COLUMN)52 Veracruz(COLUMN)cloudy(COLUMN)86(COLUMN)77 Winnipeg(COLUMN)cloudy(COLUMN)77(COLUMN)89(END TABLE)